cpu-8815.c 8.1 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266
  1. /*
  2. * Copyright STMicroelectronics, 2007.
  3. *
  4. * This program is free software; you can redistribute it and/or modify
  5. * it under the terms of the GNU General Public License as published by
  6. * the Free Software Foundation; either version 2 of the License, or
  7. * (at your option) any later version.
  8. *
  9. * This program is distributed in the hope that it will be useful,
  10. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12. * GNU General Public License for more details.
  13. *
  14. * You should have received a copy of the GNU General Public License
  15. * along with this program; if not, write to the Free Software
  16. * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  17. */
  18. #include <linux/types.h>
  19. #include <linux/init.h>
  20. #include <linux/device.h>
  21. #include <linux/amba/bus.h>
  22. #include <linux/platform_device.h>
  23. #include <linux/io.h>
  24. #include <linux/slab.h>
  25. #include <linux/irq.h>
  26. #include <linux/dma-mapping.h>
  27. #include <linux/platform_data/clk-nomadik.h>
  28. #include <linux/clocksource.h>
  29. #include <linux/of_irq.h>
  30. #include <linux/of_gpio.h>
  31. #include <linux/of_address.h>
  32. #include <linux/of_platform.h>
  33. #include <linux/mtd/fsmc.h>
  34. #include <linux/gpio.h>
  35. #include <linux/amba/mmci.h>
  36. #include <asm/mach/arch.h>
  37. #include <asm/mach/map.h>
  38. #include <asm/mach/time.h>
  39. #include <asm/mach-types.h>
  40. #include <asm/cacheflush.h>
  41. #include <asm/hardware/cache-l2x0.h>
  42. /*
  43. * These are the only hard-coded address offsets we still have to use.
  44. */
  45. #define NOMADIK_FSMC_BASE 0x10100000 /* FSMC registers */
  46. #define NOMADIK_SDRAMC_BASE 0x10110000 /* SDRAM Controller */
  47. #define NOMADIK_CLCDC_BASE 0x10120000 /* CLCD Controller */
  48. #define NOMADIK_MDIF_BASE 0x10120000 /* MDIF */
  49. #define NOMADIK_DMA0_BASE 0x10130000 /* DMA0 Controller */
  50. #define NOMADIK_IC_BASE 0x10140000 /* Vectored Irq Controller */
  51. #define NOMADIK_DMA1_BASE 0x10150000 /* DMA1 Controller */
  52. #define NOMADIK_USB_BASE 0x10170000 /* USB-OTG conf reg base */
  53. #define NOMADIK_CRYP_BASE 0x10180000 /* Crypto processor */
  54. #define NOMADIK_SHA1_BASE 0x10190000 /* SHA-1 Processor */
  55. #define NOMADIK_XTI_BASE 0x101A0000 /* XTI */
  56. #define NOMADIK_RNG_BASE 0x101B0000 /* Random number generator */
  57. #define NOMADIK_SRC_BASE 0x101E0000 /* SRC base */
  58. #define NOMADIK_WDOG_BASE 0x101E1000 /* Watchdog */
  59. #define NOMADIK_MTU0_BASE 0x101E2000 /* Multiple Timer 0 */
  60. #define NOMADIK_MTU1_BASE 0x101E3000 /* Multiple Timer 1 */
  61. #define NOMADIK_GPIO0_BASE 0x101E4000 /* GPIO0 */
  62. #define NOMADIK_GPIO1_BASE 0x101E5000 /* GPIO1 */
  63. #define NOMADIK_GPIO2_BASE 0x101E6000 /* GPIO2 */
  64. #define NOMADIK_GPIO3_BASE 0x101E7000 /* GPIO3 */
  65. #define NOMADIK_RTC_BASE 0x101E8000 /* Real Time Clock base */
  66. #define NOMADIK_PMU_BASE 0x101E9000 /* Power Management Unit */
  67. #define NOMADIK_OWM_BASE 0x101EA000 /* One wire master */
  68. #define NOMADIK_SCR_BASE 0x101EF000 /* Secure Control registers */
  69. #define NOMADIK_MSP2_BASE 0x101F0000 /* MSP 2 interface */
  70. #define NOMADIK_MSP1_BASE 0x101F1000 /* MSP 1 interface */
  71. #define NOMADIK_UART2_BASE 0x101F2000 /* UART 2 interface */
  72. #define NOMADIK_SSIRx_BASE 0x101F3000 /* SSI 8-ch rx interface */
  73. #define NOMADIK_SSITx_BASE 0x101F4000 /* SSI 8-ch tx interface */
  74. #define NOMADIK_MSHC_BASE 0x101F5000 /* Memory Stick(Pro) Host */
  75. #define NOMADIK_SDI_BASE 0x101F6000 /* SD-card/MM-Card */
  76. #define NOMADIK_I2C1_BASE 0x101F7000 /* I2C1 interface */
  77. #define NOMADIK_I2C0_BASE 0x101F8000 /* I2C0 interface */
  78. #define NOMADIK_MSP0_BASE 0x101F9000 /* MSP 0 interface */
  79. #define NOMADIK_FIRDA_BASE 0x101FA000 /* FIrDA interface */
  80. #define NOMADIK_UART1_BASE 0x101FB000 /* UART 1 interface */
  81. #define NOMADIK_SSP_BASE 0x101FC000 /* SSP interface */
  82. #define NOMADIK_UART0_BASE 0x101FD000 /* UART 0 interface */
  83. #define NOMADIK_SGA_BASE 0x101FE000 /* SGA interface */
  84. #define NOMADIK_L2CC_BASE 0x10210000 /* L2 Cache controller */
  85. #define NOMADIK_UART1_VBASE 0xF01FB000
  86. /* This is needed for LL-debug/earlyprintk/debug-macro.S */
  87. static struct map_desc cpu8815_io_desc[] __initdata = {
  88. {
  89. .virtual = NOMADIK_UART1_VBASE,
  90. .pfn = __phys_to_pfn(NOMADIK_UART1_BASE),
  91. .length = SZ_4K,
  92. .type = MT_DEVICE,
  93. },
  94. };
  95. static void __init cpu8815_map_io(void)
  96. {
  97. iotable_init(cpu8815_io_desc, ARRAY_SIZE(cpu8815_io_desc));
  98. }
  99. static void cpu8815_restart(enum reboot_mode mode, const char *cmd)
  100. {
  101. void __iomem *srcbase = ioremap(NOMADIK_SRC_BASE, SZ_4K);
  102. /* FIXME: use egpio when implemented */
  103. /* Write anything to Reset status register */
  104. writel(1, srcbase + 0x18);
  105. }
  106. /* Initial value for SRC control register: all timers use MXTAL/8 source */
  107. #define SRC_CR_INIT_MASK 0x00007fff
  108. #define SRC_CR_INIT_VAL 0x2aaa8000
  109. static void __init cpu8815_timer_init_of(void)
  110. {
  111. struct device_node *mtu;
  112. void __iomem *base;
  113. int irq;
  114. u32 src_cr;
  115. /* We need this to be up now */
  116. nomadik_clk_init();
  117. mtu = of_find_node_by_path("/mtu@101e2000");
  118. if (!mtu)
  119. return;
  120. base = of_iomap(mtu, 0);
  121. if (WARN_ON(!base))
  122. return;
  123. irq = irq_of_parse_and_map(mtu, 0);
  124. pr_info("Remapped MTU @ %p, irq: %d\n", base, irq);
  125. /* Configure timer sources in "system reset controller" ctrl reg */
  126. src_cr = readl(base);
  127. src_cr &= SRC_CR_INIT_MASK;
  128. src_cr |= SRC_CR_INIT_VAL;
  129. writel(src_cr, base);
  130. clocksource_of_init();
  131. }
  132. static struct fsmc_nand_timings cpu8815_nand_timings = {
  133. .thiz = 0,
  134. .thold = 0x10,
  135. .twait = 0x0A,
  136. .tset = 0,
  137. };
  138. static struct fsmc_nand_platform_data cpu8815_nand_data = {
  139. .nand_timings = &cpu8815_nand_timings,
  140. };
  141. /*
  142. * The SMSC911x IRQ is connected to a GPIO pin, but the driver expects
  143. * to simply request an IRQ passed as a resource. So the GPIO pin needs
  144. * to be requested by this hog and set as input.
  145. */
  146. static int __init cpu8815_eth_init(void)
  147. {
  148. struct device_node *eth;
  149. int gpio, irq, err;
  150. eth = of_find_node_by_path("/usb-s8815/ethernet-gpio");
  151. if (!eth) {
  152. pr_info("could not find any ethernet GPIO\n");
  153. return 0;
  154. }
  155. gpio = of_get_gpio(eth, 0);
  156. err = gpio_request(gpio, "eth_irq");
  157. if (err) {
  158. pr_info("failed to request ethernet GPIO\n");
  159. return -ENODEV;
  160. }
  161. err = gpio_direction_input(gpio);
  162. if (err) {
  163. pr_info("failed to set ethernet GPIO as input\n");
  164. return -ENODEV;
  165. }
  166. irq = gpio_to_irq(gpio);
  167. pr_info("enabled USB-S8815 ethernet GPIO %d, IRQ %d\n", gpio, irq);
  168. return 0;
  169. }
  170. device_initcall(cpu8815_eth_init);
  171. /*
  172. * TODO:
  173. * cannot be set from device tree, convert to a proper DT
  174. * binding.
  175. */
  176. static struct mmci_platform_data mmcsd_plat_data = {
  177. .ocr_mask = MMC_VDD_29_30,
  178. };
  179. /*
  180. * This GPIO pin turns on a line that is used to detect card insertion
  181. * on this board.
  182. */
  183. static int __init cpu8815_mmcsd_init(void)
  184. {
  185. struct device_node *cdbias;
  186. int gpio, err;
  187. cdbias = of_find_node_by_path("/usb-s8815/mmcsd-gpio");
  188. if (!cdbias) {
  189. pr_info("could not find MMC/SD card detect bias node\n");
  190. return 0;
  191. }
  192. gpio = of_get_gpio(cdbias, 0);
  193. if (gpio < 0) {
  194. pr_info("could not obtain MMC/SD card detect bias GPIO\n");
  195. return 0;
  196. }
  197. err = gpio_request(gpio, "card detect bias");
  198. if (err) {
  199. pr_info("failed to request card detect bias GPIO %d\n", gpio);
  200. return -ENODEV;
  201. }
  202. err = gpio_direction_output(gpio, 0);
  203. if (err){
  204. pr_info("failed to set GPIO %d as output, low\n", gpio);
  205. return err;
  206. }
  207. pr_info("enabled USB-S8815 CD bias GPIO %d, low\n", gpio);
  208. return 0;
  209. }
  210. device_initcall(cpu8815_mmcsd_init);
  211. /* These are mostly to get the right device names for the clock lookups */
  212. static struct of_dev_auxdata cpu8815_auxdata_lookup[] __initdata = {
  213. OF_DEV_AUXDATA("stericsson,fsmc-nand", NOMADIK_FSMC_BASE,
  214. NULL, &cpu8815_nand_data),
  215. OF_DEV_AUXDATA("arm,primecell", NOMADIK_SDI_BASE,
  216. NULL, &mmcsd_plat_data),
  217. { /* sentinel */ },
  218. };
  219. static void __init cpu8815_init_of(void)
  220. {
  221. #ifdef CONFIG_CACHE_L2X0
  222. /* At full speed latency must be >=2, so 0x249 in low bits */
  223. l2x0_of_init(0x00730249, 0xfe000fff);
  224. #endif
  225. of_platform_populate(NULL, of_default_bus_match_table,
  226. cpu8815_auxdata_lookup, NULL);
  227. }
  228. static const char * cpu8815_board_compat[] = {
  229. "calaosystems,usb-s8815",
  230. NULL,
  231. };
  232. DT_MACHINE_START(NOMADIK_DT, "Nomadik STn8815")
  233. .map_io = cpu8815_map_io,
  234. .init_time = cpu8815_timer_init_of,
  235. .init_machine = cpu8815_init_of,
  236. .restart = cpu8815_restart,
  237. .dt_compat = cpu8815_board_compat,
  238. MACHINE_END