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@@ -29,6 +29,7 @@
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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*/
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*/
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+
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#include <linux/config.h>
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/errno.h>
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@@ -42,6 +43,8 @@
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#include <asm/mach-au1x00/au1xxx_dbdma.h>
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#include <asm/mach-au1x00/au1xxx_dbdma.h>
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#include <asm/system.h>
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#include <asm/system.h>
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+/* #include <linux/module.h> */
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+
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#if defined(CONFIG_SOC_AU1550) || defined(CONFIG_SOC_AU1200)
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#if defined(CONFIG_SOC_AU1550) || defined(CONFIG_SOC_AU1200)
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/*
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/*
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@@ -55,43 +58,16 @@
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* functions. The drivers allocate the data buffers and assign them
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* functions. The drivers allocate the data buffers and assign them
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* to the descriptors.
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* to the descriptors.
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*/
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*/
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-static DEFINE_SPINLOCK(au1xxx_dbdma_spin_lock);
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+static spinlock_t au1xxx_dbdma_spin_lock = SPIN_LOCK_UNLOCKED;
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/* I couldn't find a macro that did this......
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/* I couldn't find a macro that did this......
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*/
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*/
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#define ALIGN_ADDR(x, a) ((((u32)(x)) + (a-1)) & ~(a-1))
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#define ALIGN_ADDR(x, a) ((((u32)(x)) + (a-1)) & ~(a-1))
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-static volatile dbdma_global_t *dbdma_gptr = (dbdma_global_t *)DDMA_GLOBAL_BASE;
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-static int dbdma_initialized;
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+static dbdma_global_t *dbdma_gptr = (dbdma_global_t *)DDMA_GLOBAL_BASE;
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+static int dbdma_initialized=0;
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static void au1xxx_dbdma_init(void);
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static void au1xxx_dbdma_init(void);
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-typedef struct dbdma_device_table {
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- u32 dev_id;
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- u32 dev_flags;
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- u32 dev_tsize;
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- u32 dev_devwidth;
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- u32 dev_physaddr; /* If FIFO */
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- u32 dev_intlevel;
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- u32 dev_intpolarity;
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-} dbdev_tab_t;
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-
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-typedef struct dbdma_chan_config {
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- u32 chan_flags;
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- u32 chan_index;
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- dbdev_tab_t *chan_src;
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- dbdev_tab_t *chan_dest;
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- au1x_dma_chan_t *chan_ptr;
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- au1x_ddma_desc_t *chan_desc_base;
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- au1x_ddma_desc_t *get_ptr, *put_ptr, *cur_ptr;
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- void *chan_callparam;
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- void (*chan_callback)(int, void *, struct pt_regs *);
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-} chan_tab_t;
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-
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-#define DEV_FLAGS_INUSE (1 << 0)
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-#define DEV_FLAGS_ANYUSE (1 << 1)
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-#define DEV_FLAGS_OUT (1 << 2)
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-#define DEV_FLAGS_IN (1 << 3)
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-
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static dbdev_tab_t dbdev_tab[] = {
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static dbdev_tab_t dbdev_tab[] = {
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#ifdef CONFIG_SOC_AU1550
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#ifdef CONFIG_SOC_AU1550
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/* UARTS */
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/* UARTS */
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@@ -157,13 +133,13 @@ static dbdev_tab_t dbdev_tab[] = {
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{ DSCR_CMD0_MAE_BOTH, DEV_FLAGS_ANYUSE, 0, 0, 0x00000000, 0, 0 },
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{ DSCR_CMD0_MAE_BOTH, DEV_FLAGS_ANYUSE, 0, 0, 0x00000000, 0, 0 },
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{ DSCR_CMD0_LCD, DEV_FLAGS_ANYUSE, 0, 0, 0x00000000, 0, 0 },
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{ DSCR_CMD0_LCD, DEV_FLAGS_ANYUSE, 0, 0, 0x00000000, 0, 0 },
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- { DSCR_CMD0_SDMS_TX0, DEV_FLAGS_OUT, 0, 0, 0x00000000, 0, 0 },
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- { DSCR_CMD0_SDMS_RX0, DEV_FLAGS_IN, 0, 0, 0x00000000, 0, 0 },
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- { DSCR_CMD0_SDMS_TX1, DEV_FLAGS_OUT, 0, 0, 0x00000000, 0, 0 },
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- { DSCR_CMD0_SDMS_RX1, DEV_FLAGS_IN, 0, 0, 0x00000000, 0, 0 },
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+ { DSCR_CMD0_SDMS_TX0, DEV_FLAGS_OUT, 4, 8, 0x10600000, 0, 0 },
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+ { DSCR_CMD0_SDMS_RX0, DEV_FLAGS_IN, 4, 8, 0x10600004, 0, 0 },
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+ { DSCR_CMD0_SDMS_TX1, DEV_FLAGS_OUT, 4, 8, 0x10680000, 0, 0 },
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+ { DSCR_CMD0_SDMS_RX1, DEV_FLAGS_IN, 4, 8, 0x10680004, 0, 0 },
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- { DSCR_CMD0_AES_TX, DEV_FLAGS_OUT, 0, 0, 0x00000000, 0, 0 },
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- { DSCR_CMD0_AES_RX, DEV_FLAGS_IN, 0, 0, 0x00000000, 0, 0 },
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+ { DSCR_CMD0_AES_RX, DEV_FLAGS_IN , 4, 32, 0x10300008, 0, 0 },
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+ { DSCR_CMD0_AES_TX, DEV_FLAGS_OUT, 4, 32, 0x10300004, 0, 0 },
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{ DSCR_CMD0_PSC0_TX, DEV_FLAGS_OUT, 0, 0, 0x11a0001c, 0, 0 },
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{ DSCR_CMD0_PSC0_TX, DEV_FLAGS_OUT, 0, 0, 0x11a0001c, 0, 0 },
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{ DSCR_CMD0_PSC0_RX, DEV_FLAGS_IN, 0, 0, 0x11a0001c, 0, 0 },
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{ DSCR_CMD0_PSC0_RX, DEV_FLAGS_IN, 0, 0, 0x11a0001c, 0, 0 },
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@@ -173,9 +149,9 @@ static dbdev_tab_t dbdev_tab[] = {
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{ DSCR_CMD0_PSC1_RX, DEV_FLAGS_IN, 0, 0, 0x11b0001c, 0, 0 },
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{ DSCR_CMD0_PSC1_RX, DEV_FLAGS_IN, 0, 0, 0x11b0001c, 0, 0 },
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{ DSCR_CMD0_PSC1_SYNC, DEV_FLAGS_ANYUSE, 0, 0, 0x00000000, 0, 0 },
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{ DSCR_CMD0_PSC1_SYNC, DEV_FLAGS_ANYUSE, 0, 0, 0x00000000, 0, 0 },
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- { DSCR_CMD0_CIM_RXA, DEV_FLAGS_IN, 0, 0, 0x00000000, 0, 0 },
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- { DSCR_CMD0_CIM_RXB, DEV_FLAGS_IN, 0, 0, 0x00000000, 0, 0 },
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- { DSCR_CMD0_CIM_RXC, DEV_FLAGS_IN, 0, 0, 0x00000000, 0, 0 },
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+ { DSCR_CMD0_CIM_RXA, DEV_FLAGS_IN, 0, 32, 0x14004020, 0, 0 },
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+ { DSCR_CMD0_CIM_RXB, DEV_FLAGS_IN, 0, 32, 0x14004040, 0, 0 },
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+ { DSCR_CMD0_CIM_RXC, DEV_FLAGS_IN, 0, 32, 0x14004060, 0, 0 },
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{ DSCR_CMD0_CIM_SYNC, DEV_FLAGS_ANYUSE, 0, 0, 0x00000000, 0, 0 },
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{ DSCR_CMD0_CIM_SYNC, DEV_FLAGS_ANYUSE, 0, 0, 0x00000000, 0, 0 },
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{ DSCR_CMD0_NAND_FLASH, DEV_FLAGS_IN, 0, 0, 0x00000000, 0, 0 },
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{ DSCR_CMD0_NAND_FLASH, DEV_FLAGS_IN, 0, 0, 0x00000000, 0, 0 },
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@@ -184,6 +160,24 @@ static dbdev_tab_t dbdev_tab[] = {
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{ DSCR_CMD0_THROTTLE, DEV_FLAGS_ANYUSE, 0, 0, 0x00000000, 0, 0 },
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{ DSCR_CMD0_THROTTLE, DEV_FLAGS_ANYUSE, 0, 0, 0x00000000, 0, 0 },
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{ DSCR_CMD0_ALWAYS, DEV_FLAGS_ANYUSE, 0, 0, 0x00000000, 0, 0 },
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{ DSCR_CMD0_ALWAYS, DEV_FLAGS_ANYUSE, 0, 0, 0x00000000, 0, 0 },
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+
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+ /* Provide 16 user definable device types */
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+ { 0, 0, 0, 0, 0, 0, 0 },
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+ { 0, 0, 0, 0, 0, 0, 0 },
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+ { 0, 0, 0, 0, 0, 0, 0 },
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+ { 0, 0, 0, 0, 0, 0, 0 },
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+ { 0, 0, 0, 0, 0, 0, 0 },
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+ { 0, 0, 0, 0, 0, 0, 0 },
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+ { 0, 0, 0, 0, 0, 0, 0 },
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+ { 0, 0, 0, 0, 0, 0, 0 },
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+ { 0, 0, 0, 0, 0, 0, 0 },
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+ { 0, 0, 0, 0, 0, 0, 0 },
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+ { 0, 0, 0, 0, 0, 0, 0 },
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+ { 0, 0, 0, 0, 0, 0, 0 },
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+ { 0, 0, 0, 0, 0, 0, 0 },
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+ { 0, 0, 0, 0, 0, 0, 0 },
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+ { 0, 0, 0, 0, 0, 0, 0 },
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+ { 0, 0, 0, 0, 0, 0, 0 },
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};
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};
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#define DBDEV_TAB_SIZE (sizeof(dbdev_tab) / sizeof(dbdev_tab_t))
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#define DBDEV_TAB_SIZE (sizeof(dbdev_tab) / sizeof(dbdev_tab_t))
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@@ -203,6 +197,30 @@ find_dbdev_id (u32 id)
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return NULL;
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return NULL;
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}
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}
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+u32
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+au1xxx_ddma_add_device(dbdev_tab_t *dev)
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+{
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+ u32 ret = 0;
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+ dbdev_tab_t *p=NULL;
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+ static u16 new_id=0x1000;
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+
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+ p = find_dbdev_id(0);
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+ if ( NULL != p )
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+ {
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+ memcpy(p, dev, sizeof(dbdev_tab_t));
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+ p->dev_id = DSCR_DEV2CUSTOM_ID(new_id,dev->dev_id);
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+ ret = p->dev_id;
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+ new_id++;
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+#if 0
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+ printk("add_device: id:%x flags:%x padd:%x\n",
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+ p->dev_id, p->dev_flags, p->dev_physaddr );
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+#endif
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+ }
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+
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+ return ret;
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+}
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+EXPORT_SYMBOL(au1xxx_ddma_add_device);
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+
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/* Allocate a channel and return a non-zero descriptor if successful.
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/* Allocate a channel and return a non-zero descriptor if successful.
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*/
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*/
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u32
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u32
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@@ -215,7 +233,7 @@ au1xxx_dbdma_chan_alloc(u32 srcid, u32 destid,
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int i;
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int i;
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dbdev_tab_t *stp, *dtp;
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dbdev_tab_t *stp, *dtp;
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chan_tab_t *ctp;
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chan_tab_t *ctp;
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- volatile au1x_dma_chan_t *cp;
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+ au1x_dma_chan_t *cp;
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/* We do the intialization on the first channel allocation.
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/* We do the intialization on the first channel allocation.
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* We have to wait because of the interrupt handler initialization
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* We have to wait because of the interrupt handler initialization
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@@ -225,9 +243,6 @@ au1xxx_dbdma_chan_alloc(u32 srcid, u32 destid,
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au1xxx_dbdma_init();
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au1xxx_dbdma_init();
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dbdma_initialized = 1;
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dbdma_initialized = 1;
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- if ((srcid > DSCR_NDEV_IDS) || (destid > DSCR_NDEV_IDS))
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- return 0;
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-
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if ((stp = find_dbdev_id(srcid)) == NULL) return 0;
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if ((stp = find_dbdev_id(srcid)) == NULL) return 0;
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if ((dtp = find_dbdev_id(destid)) == NULL) return 0;
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if ((dtp = find_dbdev_id(destid)) == NULL) return 0;
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@@ -269,9 +284,9 @@ au1xxx_dbdma_chan_alloc(u32 srcid, u32 destid,
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/* If kmalloc fails, it is caught below same
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/* If kmalloc fails, it is caught below same
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* as a channel not available.
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* as a channel not available.
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*/
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*/
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- ctp = kmalloc(sizeof(chan_tab_t), GFP_KERNEL);
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+ ctp = (chan_tab_t *)
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+ kmalloc(sizeof(chan_tab_t), GFP_KERNEL);
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chan_tab_ptr[i] = ctp;
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chan_tab_ptr[i] = ctp;
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- ctp->chan_index = chan = i;
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break;
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break;
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}
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}
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}
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}
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@@ -279,10 +294,11 @@ au1xxx_dbdma_chan_alloc(u32 srcid, u32 destid,
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if (ctp != NULL) {
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if (ctp != NULL) {
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memset(ctp, 0, sizeof(chan_tab_t));
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memset(ctp, 0, sizeof(chan_tab_t));
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+ ctp->chan_index = chan = i;
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dcp = DDMA_CHANNEL_BASE;
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dcp = DDMA_CHANNEL_BASE;
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dcp += (0x0100 * chan);
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dcp += (0x0100 * chan);
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ctp->chan_ptr = (au1x_dma_chan_t *)dcp;
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ctp->chan_ptr = (au1x_dma_chan_t *)dcp;
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- cp = (volatile au1x_dma_chan_t *)dcp;
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+ cp = (au1x_dma_chan_t *)dcp;
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ctp->chan_src = stp;
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ctp->chan_src = stp;
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ctp->chan_dest = dtp;
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ctp->chan_dest = dtp;
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ctp->chan_callback = callback;
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ctp->chan_callback = callback;
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@@ -299,6 +315,9 @@ au1xxx_dbdma_chan_alloc(u32 srcid, u32 destid,
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i |= DDMA_CFG_DED;
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i |= DDMA_CFG_DED;
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if (dtp->dev_intpolarity)
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if (dtp->dev_intpolarity)
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i |= DDMA_CFG_DP;
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i |= DDMA_CFG_DP;
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+ if ((stp->dev_flags & DEV_FLAGS_SYNC) ||
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+ (dtp->dev_flags & DEV_FLAGS_SYNC))
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+ i |= DDMA_CFG_SYNC;
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cp->ddma_cfg = i;
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cp->ddma_cfg = i;
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au_sync();
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au_sync();
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@@ -309,14 +328,14 @@ au1xxx_dbdma_chan_alloc(u32 srcid, u32 destid,
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rv = (u32)(&chan_tab_ptr[chan]);
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rv = (u32)(&chan_tab_ptr[chan]);
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}
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}
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else {
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else {
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- /* Release devices.
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- */
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+ /* Release devices */
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stp->dev_flags &= ~DEV_FLAGS_INUSE;
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stp->dev_flags &= ~DEV_FLAGS_INUSE;
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dtp->dev_flags &= ~DEV_FLAGS_INUSE;
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dtp->dev_flags &= ~DEV_FLAGS_INUSE;
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}
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}
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}
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}
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return rv;
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return rv;
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}
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}
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+EXPORT_SYMBOL(au1xxx_dbdma_chan_alloc);
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/* Set the device width if source or destination is a FIFO.
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/* Set the device width if source or destination is a FIFO.
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* Should be 8, 16, or 32 bits.
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* Should be 8, 16, or 32 bits.
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@@ -344,6 +363,7 @@ au1xxx_dbdma_set_devwidth(u32 chanid, int bits)
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return rv;
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return rv;
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}
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}
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+EXPORT_SYMBOL(au1xxx_dbdma_set_devwidth);
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/* Allocate a descriptor ring, initializing as much as possible.
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/* Allocate a descriptor ring, initializing as much as possible.
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*/
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*/
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@@ -370,7 +390,8 @@ au1xxx_dbdma_ring_alloc(u32 chanid, int entries)
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* and if we try that first we are likely to not waste larger
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* and if we try that first we are likely to not waste larger
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* slabs of memory.
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* slabs of memory.
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*/
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*/
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- desc_base = (u32)kmalloc(entries * sizeof(au1x_ddma_desc_t), GFP_KERNEL);
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+ desc_base = (u32)kmalloc(entries * sizeof(au1x_ddma_desc_t),
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+ GFP_KERNEL|GFP_DMA);
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if (desc_base == 0)
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if (desc_base == 0)
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return 0;
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return 0;
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@@ -381,7 +402,7 @@ au1xxx_dbdma_ring_alloc(u32 chanid, int entries)
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kfree((const void *)desc_base);
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kfree((const void *)desc_base);
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i = entries * sizeof(au1x_ddma_desc_t);
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i = entries * sizeof(au1x_ddma_desc_t);
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i += (sizeof(au1x_ddma_desc_t) - 1);
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i += (sizeof(au1x_ddma_desc_t) - 1);
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- if ((desc_base = (u32)kmalloc(i, GFP_KERNEL)) == 0)
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+ if ((desc_base = (u32)kmalloc(i, GFP_KERNEL|GFP_DMA)) == 0)
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return 0;
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return 0;
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desc_base = ALIGN_ADDR(desc_base, sizeof(au1x_ddma_desc_t));
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desc_base = ALIGN_ADDR(desc_base, sizeof(au1x_ddma_desc_t));
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@@ -461,9 +482,14 @@ au1xxx_dbdma_ring_alloc(u32 chanid, int entries)
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/* If source input is fifo, set static address.
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/* If source input is fifo, set static address.
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*/
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*/
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if (stp->dev_flags & DEV_FLAGS_IN) {
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if (stp->dev_flags & DEV_FLAGS_IN) {
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- src0 = stp->dev_physaddr;
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+ if ( stp->dev_flags & DEV_FLAGS_BURSTABLE )
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+ src1 |= DSCR_SRC1_SAM(DSCR_xAM_BURST);
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+ else
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src1 |= DSCR_SRC1_SAM(DSCR_xAM_STATIC);
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src1 |= DSCR_SRC1_SAM(DSCR_xAM_STATIC);
|
|
|
|
+
|
|
}
|
|
}
|
|
|
|
+ if (stp->dev_physaddr)
|
|
|
|
+ src0 = stp->dev_physaddr;
|
|
|
|
|
|
/* Set up dest1. For now, assume no stride and increment.
|
|
/* Set up dest1. For now, assume no stride and increment.
|
|
* A channel attribute update can change this later.
|
|
* A channel attribute update can change this later.
|
|
@@ -487,10 +513,18 @@ au1xxx_dbdma_ring_alloc(u32 chanid, int entries)
|
|
/* If destination output is fifo, set static address.
|
|
/* If destination output is fifo, set static address.
|
|
*/
|
|
*/
|
|
if (dtp->dev_flags & DEV_FLAGS_OUT) {
|
|
if (dtp->dev_flags & DEV_FLAGS_OUT) {
|
|
- dest0 = dtp->dev_physaddr;
|
|
|
|
|
|
+ if ( dtp->dev_flags & DEV_FLAGS_BURSTABLE )
|
|
|
|
+ dest1 |= DSCR_DEST1_DAM(DSCR_xAM_BURST);
|
|
|
|
+ else
|
|
dest1 |= DSCR_DEST1_DAM(DSCR_xAM_STATIC);
|
|
dest1 |= DSCR_DEST1_DAM(DSCR_xAM_STATIC);
|
|
}
|
|
}
|
|
|
|
+ if (dtp->dev_physaddr)
|
|
|
|
+ dest0 = dtp->dev_physaddr;
|
|
|
|
|
|
|
|
+#if 0
|
|
|
|
+ printk("did:%x sid:%x cmd0:%x cmd1:%x source0:%x source1:%x dest0:%x dest1:%x\n",
|
|
|
|
+ dtp->dev_id, stp->dev_id, cmd0, cmd1, src0, src1, dest0, dest1 );
|
|
|
|
+#endif
|
|
for (i=0; i<entries; i++) {
|
|
for (i=0; i<entries; i++) {
|
|
dp->dscr_cmd0 = cmd0;
|
|
dp->dscr_cmd0 = cmd0;
|
|
dp->dscr_cmd1 = cmd1;
|
|
dp->dscr_cmd1 = cmd1;
|
|
@@ -499,6 +533,7 @@ au1xxx_dbdma_ring_alloc(u32 chanid, int entries)
|
|
dp->dscr_dest0 = dest0;
|
|
dp->dscr_dest0 = dest0;
|
|
dp->dscr_dest1 = dest1;
|
|
dp->dscr_dest1 = dest1;
|
|
dp->dscr_stat = 0;
|
|
dp->dscr_stat = 0;
|
|
|
|
+ dp->sw_context = dp->sw_status = 0;
|
|
dp->dscr_nxtptr = DSCR_NXTPTR(virt_to_phys(dp + 1));
|
|
dp->dscr_nxtptr = DSCR_NXTPTR(virt_to_phys(dp + 1));
|
|
dp++;
|
|
dp++;
|
|
}
|
|
}
|
|
@@ -511,13 +546,14 @@ au1xxx_dbdma_ring_alloc(u32 chanid, int entries)
|
|
|
|
|
|
return (u32)(ctp->chan_desc_base);
|
|
return (u32)(ctp->chan_desc_base);
|
|
}
|
|
}
|
|
|
|
+EXPORT_SYMBOL(au1xxx_dbdma_ring_alloc);
|
|
|
|
|
|
/* Put a source buffer into the DMA ring.
|
|
/* Put a source buffer into the DMA ring.
|
|
* This updates the source pointer and byte count. Normally used
|
|
* This updates the source pointer and byte count. Normally used
|
|
* for memory to fifo transfers.
|
|
* for memory to fifo transfers.
|
|
*/
|
|
*/
|
|
u32
|
|
u32
|
|
-au1xxx_dbdma_put_source(u32 chanid, void *buf, int nbytes)
|
|
|
|
|
|
+_au1xxx_dbdma_put_source(u32 chanid, void *buf, int nbytes, u32 flags)
|
|
{
|
|
{
|
|
chan_tab_t *ctp;
|
|
chan_tab_t *ctp;
|
|
au1x_ddma_desc_t *dp;
|
|
au1x_ddma_desc_t *dp;
|
|
@@ -544,24 +580,40 @@ au1xxx_dbdma_put_source(u32 chanid, void *buf, int nbytes)
|
|
*/
|
|
*/
|
|
dp->dscr_source0 = virt_to_phys(buf);
|
|
dp->dscr_source0 = virt_to_phys(buf);
|
|
dp->dscr_cmd1 = nbytes;
|
|
dp->dscr_cmd1 = nbytes;
|
|
- dp->dscr_cmd0 |= DSCR_CMD0_V; /* Let it rip */
|
|
|
|
- ctp->chan_ptr->ddma_dbell = 0xffffffff; /* Make it go */
|
|
|
|
-
|
|
|
|
|
|
+ /* Check flags */
|
|
|
|
+ if (flags & DDMA_FLAGS_IE)
|
|
|
|
+ dp->dscr_cmd0 |= DSCR_CMD0_IE;
|
|
|
|
+ if (flags & DDMA_FLAGS_NOIE)
|
|
|
|
+ dp->dscr_cmd0 &= ~DSCR_CMD0_IE;
|
|
/* Get next descriptor pointer.
|
|
/* Get next descriptor pointer.
|
|
*/
|
|
*/
|
|
ctp->put_ptr = phys_to_virt(DSCR_GET_NXTPTR(dp->dscr_nxtptr));
|
|
ctp->put_ptr = phys_to_virt(DSCR_GET_NXTPTR(dp->dscr_nxtptr));
|
|
|
|
|
|
|
|
+ /*
|
|
|
|
+ * There is an errata on the Au1200/Au1550 parts that could result
|
|
|
|
+ * in "stale" data being DMA'd. It has to do with the snoop logic on
|
|
|
|
+ * the dache eviction buffer. NONCOHERENT_IO is on by default for
|
|
|
|
+ * these parts. If it is fixedin the future, these dma_cache_inv will
|
|
|
|
+ * just be nothing more than empty macros. See io.h.
|
|
|
|
+ * */
|
|
|
|
+ dma_cache_wback_inv(buf,nbytes);
|
|
|
|
+ dp->dscr_cmd0 |= DSCR_CMD0_V; /* Let it rip */
|
|
|
|
+ au_sync();
|
|
|
|
+ dma_cache_wback_inv(dp, sizeof(dp));
|
|
|
|
+ ctp->chan_ptr->ddma_dbell = 0;
|
|
|
|
+
|
|
/* return something not zero.
|
|
/* return something not zero.
|
|
*/
|
|
*/
|
|
return nbytes;
|
|
return nbytes;
|
|
}
|
|
}
|
|
|
|
+EXPORT_SYMBOL(_au1xxx_dbdma_put_source);
|
|
|
|
|
|
/* Put a destination buffer into the DMA ring.
|
|
/* Put a destination buffer into the DMA ring.
|
|
* This updates the destination pointer and byte count. Normally used
|
|
* This updates the destination pointer and byte count. Normally used
|
|
* to place an empty buffer into the ring for fifo to memory transfers.
|
|
* to place an empty buffer into the ring for fifo to memory transfers.
|
|
*/
|
|
*/
|
|
u32
|
|
u32
|
|
-au1xxx_dbdma_put_dest(u32 chanid, void *buf, int nbytes)
|
|
|
|
|
|
+_au1xxx_dbdma_put_dest(u32 chanid, void *buf, int nbytes, u32 flags)
|
|
{
|
|
{
|
|
chan_tab_t *ctp;
|
|
chan_tab_t *ctp;
|
|
au1x_ddma_desc_t *dp;
|
|
au1x_ddma_desc_t *dp;
|
|
@@ -583,11 +635,33 @@ au1xxx_dbdma_put_dest(u32 chanid, void *buf, int nbytes)
|
|
if (dp->dscr_cmd0 & DSCR_CMD0_V)
|
|
if (dp->dscr_cmd0 & DSCR_CMD0_V)
|
|
return 0;
|
|
return 0;
|
|
|
|
|
|
- /* Load up buffer address and byte count.
|
|
|
|
- */
|
|
|
|
|
|
+ /* Load up buffer address and byte count */
|
|
|
|
+
|
|
|
|
+ /* Check flags */
|
|
|
|
+ if (flags & DDMA_FLAGS_IE)
|
|
|
|
+ dp->dscr_cmd0 |= DSCR_CMD0_IE;
|
|
|
|
+ if (flags & DDMA_FLAGS_NOIE)
|
|
|
|
+ dp->dscr_cmd0 &= ~DSCR_CMD0_IE;
|
|
|
|
+
|
|
dp->dscr_dest0 = virt_to_phys(buf);
|
|
dp->dscr_dest0 = virt_to_phys(buf);
|
|
dp->dscr_cmd1 = nbytes;
|
|
dp->dscr_cmd1 = nbytes;
|
|
|
|
+#if 0
|
|
|
|
+ printk("cmd0:%x cmd1:%x source0:%x source1:%x dest0:%x dest1:%x\n",
|
|
|
|
+ dp->dscr_cmd0, dp->dscr_cmd1, dp->dscr_source0,
|
|
|
|
+ dp->dscr_source1, dp->dscr_dest0, dp->dscr_dest1 );
|
|
|
|
+#endif
|
|
|
|
+ /*
|
|
|
|
+ * There is an errata on the Au1200/Au1550 parts that could result in
|
|
|
|
+ * "stale" data being DMA'd. It has to do with the snoop logic on the
|
|
|
|
+ * dache eviction buffer. NONCOHERENT_IO is on by default for these
|
|
|
|
+ * parts. If it is fixedin the future, these dma_cache_inv will just
|
|
|
|
+ * be nothing more than empty macros. See io.h.
|
|
|
|
+ * */
|
|
|
|
+ dma_cache_inv(buf,nbytes);
|
|
dp->dscr_cmd0 |= DSCR_CMD0_V; /* Let it rip */
|
|
dp->dscr_cmd0 |= DSCR_CMD0_V; /* Let it rip */
|
|
|
|
+ au_sync();
|
|
|
|
+ dma_cache_wback_inv(dp, sizeof(dp));
|
|
|
|
+ ctp->chan_ptr->ddma_dbell = 0;
|
|
|
|
|
|
/* Get next descriptor pointer.
|
|
/* Get next descriptor pointer.
|
|
*/
|
|
*/
|
|
@@ -597,6 +671,7 @@ au1xxx_dbdma_put_dest(u32 chanid, void *buf, int nbytes)
|
|
*/
|
|
*/
|
|
return nbytes;
|
|
return nbytes;
|
|
}
|
|
}
|
|
|
|
+EXPORT_SYMBOL(_au1xxx_dbdma_put_dest);
|
|
|
|
|
|
/* Get a destination buffer into the DMA ring.
|
|
/* Get a destination buffer into the DMA ring.
|
|
* Normally used to get a full buffer from the ring during fifo
|
|
* Normally used to get a full buffer from the ring during fifo
|
|
@@ -646,7 +721,7 @@ void
|
|
au1xxx_dbdma_stop(u32 chanid)
|
|
au1xxx_dbdma_stop(u32 chanid)
|
|
{
|
|
{
|
|
chan_tab_t *ctp;
|
|
chan_tab_t *ctp;
|
|
- volatile au1x_dma_chan_t *cp;
|
|
|
|
|
|
+ au1x_dma_chan_t *cp;
|
|
int halt_timeout = 0;
|
|
int halt_timeout = 0;
|
|
|
|
|
|
ctp = *((chan_tab_t **)chanid);
|
|
ctp = *((chan_tab_t **)chanid);
|
|
@@ -666,6 +741,7 @@ au1xxx_dbdma_stop(u32 chanid)
|
|
cp->ddma_stat |= (DDMA_STAT_DB | DDMA_STAT_V);
|
|
cp->ddma_stat |= (DDMA_STAT_DB | DDMA_STAT_V);
|
|
au_sync();
|
|
au_sync();
|
|
}
|
|
}
|
|
|
|
+EXPORT_SYMBOL(au1xxx_dbdma_stop);
|
|
|
|
|
|
/* Start using the current descriptor pointer. If the dbdma encounters
|
|
/* Start using the current descriptor pointer. If the dbdma encounters
|
|
* a not valid descriptor, it will stop. In this case, we can just
|
|
* a not valid descriptor, it will stop. In this case, we can just
|
|
@@ -675,17 +751,17 @@ void
|
|
au1xxx_dbdma_start(u32 chanid)
|
|
au1xxx_dbdma_start(u32 chanid)
|
|
{
|
|
{
|
|
chan_tab_t *ctp;
|
|
chan_tab_t *ctp;
|
|
- volatile au1x_dma_chan_t *cp;
|
|
|
|
|
|
+ au1x_dma_chan_t *cp;
|
|
|
|
|
|
ctp = *((chan_tab_t **)chanid);
|
|
ctp = *((chan_tab_t **)chanid);
|
|
-
|
|
|
|
cp = ctp->chan_ptr;
|
|
cp = ctp->chan_ptr;
|
|
cp->ddma_desptr = virt_to_phys(ctp->cur_ptr);
|
|
cp->ddma_desptr = virt_to_phys(ctp->cur_ptr);
|
|
cp->ddma_cfg |= DDMA_CFG_EN; /* Enable channel */
|
|
cp->ddma_cfg |= DDMA_CFG_EN; /* Enable channel */
|
|
au_sync();
|
|
au_sync();
|
|
- cp->ddma_dbell = 0xffffffff; /* Make it go */
|
|
|
|
|
|
+ cp->ddma_dbell = 0;
|
|
au_sync();
|
|
au_sync();
|
|
}
|
|
}
|
|
|
|
+EXPORT_SYMBOL(au1xxx_dbdma_start);
|
|
|
|
|
|
void
|
|
void
|
|
au1xxx_dbdma_reset(u32 chanid)
|
|
au1xxx_dbdma_reset(u32 chanid)
|
|
@@ -704,15 +780,21 @@ au1xxx_dbdma_reset(u32 chanid)
|
|
|
|
|
|
do {
|
|
do {
|
|
dp->dscr_cmd0 &= ~DSCR_CMD0_V;
|
|
dp->dscr_cmd0 &= ~DSCR_CMD0_V;
|
|
|
|
+ /* reset our SW status -- this is used to determine
|
|
|
|
+ * if a descriptor is in use by upper level SW. Since
|
|
|
|
+ * posting can reset 'V' bit.
|
|
|
|
+ */
|
|
|
|
+ dp->sw_status = 0;
|
|
dp = phys_to_virt(DSCR_GET_NXTPTR(dp->dscr_nxtptr));
|
|
dp = phys_to_virt(DSCR_GET_NXTPTR(dp->dscr_nxtptr));
|
|
} while (dp != ctp->chan_desc_base);
|
|
} while (dp != ctp->chan_desc_base);
|
|
}
|
|
}
|
|
|
|
+EXPORT_SYMBOL(au1xxx_dbdma_reset);
|
|
|
|
|
|
u32
|
|
u32
|
|
au1xxx_get_dma_residue(u32 chanid)
|
|
au1xxx_get_dma_residue(u32 chanid)
|
|
{
|
|
{
|
|
chan_tab_t *ctp;
|
|
chan_tab_t *ctp;
|
|
- volatile au1x_dma_chan_t *cp;
|
|
|
|
|
|
+ au1x_dma_chan_t *cp;
|
|
u32 rv;
|
|
u32 rv;
|
|
|
|
|
|
ctp = *((chan_tab_t **)chanid);
|
|
ctp = *((chan_tab_t **)chanid);
|
|
@@ -747,15 +829,16 @@ au1xxx_dbdma_chan_free(u32 chanid)
|
|
|
|
|
|
kfree(ctp);
|
|
kfree(ctp);
|
|
}
|
|
}
|
|
|
|
+EXPORT_SYMBOL(au1xxx_dbdma_chan_free);
|
|
|
|
|
|
-static irqreturn_t
|
|
|
|
|
|
+static void
|
|
dbdma_interrupt(int irq, void *dev_id, struct pt_regs *regs)
|
|
dbdma_interrupt(int irq, void *dev_id, struct pt_regs *regs)
|
|
{
|
|
{
|
|
- u32 intstat;
|
|
|
|
|
|
+ u32 intstat, flags;
|
|
u32 chan_index;
|
|
u32 chan_index;
|
|
chan_tab_t *ctp;
|
|
chan_tab_t *ctp;
|
|
au1x_ddma_desc_t *dp;
|
|
au1x_ddma_desc_t *dp;
|
|
- volatile au1x_dma_chan_t *cp;
|
|
|
|
|
|
+ au1x_dma_chan_t *cp;
|
|
|
|
|
|
intstat = dbdma_gptr->ddma_intstat;
|
|
intstat = dbdma_gptr->ddma_intstat;
|
|
au_sync();
|
|
au_sync();
|
|
@@ -774,19 +857,26 @@ dbdma_interrupt(int irq, void *dev_id, struct pt_regs *regs)
|
|
(ctp->chan_callback)(irq, ctp->chan_callparam, regs);
|
|
(ctp->chan_callback)(irq, ctp->chan_callparam, regs);
|
|
|
|
|
|
ctp->cur_ptr = phys_to_virt(DSCR_GET_NXTPTR(dp->dscr_nxtptr));
|
|
ctp->cur_ptr = phys_to_virt(DSCR_GET_NXTPTR(dp->dscr_nxtptr));
|
|
-
|
|
|
|
- return IRQ_HANDLED;
|
|
|
|
}
|
|
}
|
|
|
|
|
|
-static void
|
|
|
|
-au1xxx_dbdma_init(void)
|
|
|
|
|
|
+static void au1xxx_dbdma_init(void)
|
|
{
|
|
{
|
|
|
|
+ int irq_nr;
|
|
|
|
+
|
|
dbdma_gptr->ddma_config = 0;
|
|
dbdma_gptr->ddma_config = 0;
|
|
dbdma_gptr->ddma_throttle = 0;
|
|
dbdma_gptr->ddma_throttle = 0;
|
|
dbdma_gptr->ddma_inten = 0xffff;
|
|
dbdma_gptr->ddma_inten = 0xffff;
|
|
au_sync();
|
|
au_sync();
|
|
|
|
|
|
- if (request_irq(AU1550_DDMA_INT, dbdma_interrupt, SA_INTERRUPT,
|
|
|
|
|
|
+#if defined(CONFIG_SOC_AU1550)
|
|
|
|
+ irq_nr = AU1550_DDMA_INT;
|
|
|
|
+#elif defined(CONFIG_SOC_AU1200)
|
|
|
|
+ irq_nr = AU1200_DDMA_INT;
|
|
|
|
+#else
|
|
|
|
+ #error Unknown Au1x00 SOC
|
|
|
|
+#endif
|
|
|
|
+
|
|
|
|
+ if (request_irq(irq_nr, dbdma_interrupt, SA_INTERRUPT,
|
|
"Au1xxx dbdma", (void *)dbdma_gptr))
|
|
"Au1xxx dbdma", (void *)dbdma_gptr))
|
|
printk("Can't get 1550 dbdma irq");
|
|
printk("Can't get 1550 dbdma irq");
|
|
}
|
|
}
|
|
@@ -797,7 +887,8 @@ au1xxx_dbdma_dump(u32 chanid)
|
|
chan_tab_t *ctp;
|
|
chan_tab_t *ctp;
|
|
au1x_ddma_desc_t *dp;
|
|
au1x_ddma_desc_t *dp;
|
|
dbdev_tab_t *stp, *dtp;
|
|
dbdev_tab_t *stp, *dtp;
|
|
- volatile au1x_dma_chan_t *cp;
|
|
|
|
|
|
+ au1x_dma_chan_t *cp;
|
|
|
|
+ u32 i = 0;
|
|
|
|
|
|
ctp = *((chan_tab_t **)chanid);
|
|
ctp = *((chan_tab_t **)chanid);
|
|
stp = ctp->chan_src;
|
|
stp = ctp->chan_src;
|
|
@@ -822,15 +913,64 @@ au1xxx_dbdma_dump(u32 chanid)
|
|
dp = ctp->chan_desc_base;
|
|
dp = ctp->chan_desc_base;
|
|
|
|
|
|
do {
|
|
do {
|
|
- printk("dp %08x, cmd0 %08x, cmd1 %08x\n",
|
|
|
|
- (u32)dp, dp->dscr_cmd0, dp->dscr_cmd1);
|
|
|
|
- printk("src0 %08x, src1 %08x, dest0 %08x\n",
|
|
|
|
- dp->dscr_source0, dp->dscr_source1, dp->dscr_dest0);
|
|
|
|
- printk("dest1 %08x, stat %08x, nxtptr %08x\n",
|
|
|
|
- dp->dscr_dest1, dp->dscr_stat, dp->dscr_nxtptr);
|
|
|
|
|
|
+ printk("Dp[%d]= %08x, cmd0 %08x, cmd1 %08x\n",
|
|
|
|
+ i++, (u32)dp, dp->dscr_cmd0, dp->dscr_cmd1);
|
|
|
|
+ printk("src0 %08x, src1 %08x, dest0 %08x, dest1 %08x\n",
|
|
|
|
+ dp->dscr_source0, dp->dscr_source1, dp->dscr_dest0, dp->dscr_dest1);
|
|
|
|
+ printk("stat %08x, nxtptr %08x\n",
|
|
|
|
+ dp->dscr_stat, dp->dscr_nxtptr);
|
|
dp = phys_to_virt(DSCR_GET_NXTPTR(dp->dscr_nxtptr));
|
|
dp = phys_to_virt(DSCR_GET_NXTPTR(dp->dscr_nxtptr));
|
|
} while (dp != ctp->chan_desc_base);
|
|
} while (dp != ctp->chan_desc_base);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
+/* Put a descriptor into the DMA ring.
|
|
|
|
+ * This updates the source/destination pointers and byte count.
|
|
|
|
+ */
|
|
|
|
+u32
|
|
|
|
+au1xxx_dbdma_put_dscr(u32 chanid, au1x_ddma_desc_t *dscr )
|
|
|
|
+{
|
|
|
|
+ chan_tab_t *ctp;
|
|
|
|
+ au1x_ddma_desc_t *dp;
|
|
|
|
+ u32 nbytes=0;
|
|
|
|
+
|
|
|
|
+ /* I guess we could check this to be within the
|
|
|
|
+ * range of the table......
|
|
|
|
+ */
|
|
|
|
+ ctp = *((chan_tab_t **)chanid);
|
|
|
|
+
|
|
|
|
+ /* We should have multiple callers for a particular channel,
|
|
|
|
+ * an interrupt doesn't affect this pointer nor the descriptor,
|
|
|
|
+ * so no locking should be needed.
|
|
|
|
+ */
|
|
|
|
+ dp = ctp->put_ptr;
|
|
|
|
+
|
|
|
|
+ /* If the descriptor is valid, we are way ahead of the DMA
|
|
|
|
+ * engine, so just return an error condition.
|
|
|
|
+ */
|
|
|
|
+ if (dp->dscr_cmd0 & DSCR_CMD0_V)
|
|
|
|
+ return 0;
|
|
|
|
+
|
|
|
|
+ /* Load up buffer addresses and byte count.
|
|
|
|
+ */
|
|
|
|
+ dp->dscr_dest0 = dscr->dscr_dest0;
|
|
|
|
+ dp->dscr_source0 = dscr->dscr_source0;
|
|
|
|
+ dp->dscr_dest1 = dscr->dscr_dest1;
|
|
|
|
+ dp->dscr_source1 = dscr->dscr_source1;
|
|
|
|
+ dp->dscr_cmd1 = dscr->dscr_cmd1;
|
|
|
|
+ nbytes = dscr->dscr_cmd1;
|
|
|
|
+ /* Allow the caller to specifiy if an interrupt is generated */
|
|
|
|
+ dp->dscr_cmd0 &= ~DSCR_CMD0_IE;
|
|
|
|
+ dp->dscr_cmd0 |= dscr->dscr_cmd0 | DSCR_CMD0_V;
|
|
|
|
+ ctp->chan_ptr->ddma_dbell = 0;
|
|
|
|
+
|
|
|
|
+ /* Get next descriptor pointer.
|
|
|
|
+ */
|
|
|
|
+ ctp->put_ptr = phys_to_virt(DSCR_GET_NXTPTR(dp->dscr_nxtptr));
|
|
|
|
+
|
|
|
|
+ /* return something not zero.
|
|
|
|
+ */
|
|
|
|
+ return nbytes;
|
|
|
|
+}
|
|
|
|
+
|
|
#endif /* defined(CONFIG_SOC_AU1550) || defined(CONFIG_SOC_AU1200) */
|
|
#endif /* defined(CONFIG_SOC_AU1550) || defined(CONFIG_SOC_AU1200) */
|
|
|
|
|