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- /******************************************************************************
- * QLOGIC LINUX SOFTWARE
- *
- * QLogic ISP2x00 device driver for Linux 2.6.x
- * Copyright (C) 2003-2004 QLogic Corporation
- * (www.qlogic.com)
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2, or (at your option) any
- * later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- ******************************************************************************/
- #include "qla_def.h"
- #include <linux/delay.h>
- #include <asm/uaccess.h>
- static uint16_t qla2x00_nvram_request(scsi_qla_host_t *, uint32_t);
- static void qla2x00_nv_deselect(scsi_qla_host_t *);
- static void qla2x00_nv_write(scsi_qla_host_t *, uint16_t);
- /*
- * NVRAM support routines
- */
- /**
- * qla2x00_lock_nvram_access() -
- * @ha: HA context
- */
- void
- qla2x00_lock_nvram_access(scsi_qla_host_t *ha)
- {
- uint16_t data;
- device_reg_t __iomem *reg = ha->iobase;
- if (!IS_QLA2100(ha) && !IS_QLA2200(ha) && !IS_QLA2300(ha)) {
- data = RD_REG_WORD(®->nvram);
- while (data & NVR_BUSY) {
- udelay(100);
- data = RD_REG_WORD(®->nvram);
- }
- /* Lock resource */
- WRT_REG_WORD(®->u.isp2300.host_semaphore, 0x1);
- RD_REG_WORD(®->u.isp2300.host_semaphore);
- udelay(5);
- data = RD_REG_WORD(®->u.isp2300.host_semaphore);
- while ((data & BIT_0) == 0) {
- /* Lock failed */
- udelay(100);
- WRT_REG_WORD(®->u.isp2300.host_semaphore, 0x1);
- RD_REG_WORD(®->u.isp2300.host_semaphore);
- udelay(5);
- data = RD_REG_WORD(®->u.isp2300.host_semaphore);
- }
- }
- }
- /**
- * qla2x00_unlock_nvram_access() -
- * @ha: HA context
- */
- void
- qla2x00_unlock_nvram_access(scsi_qla_host_t *ha)
- {
- device_reg_t __iomem *reg = ha->iobase;
- if (!IS_QLA2100(ha) && !IS_QLA2200(ha) && !IS_QLA2300(ha)) {
- WRT_REG_WORD(®->u.isp2300.host_semaphore, 0);
- RD_REG_WORD(®->u.isp2300.host_semaphore);
- }
- }
- /**
- * qla2x00_release_nvram_protection() -
- * @ha: HA context
- */
- void
- qla2x00_release_nvram_protection(scsi_qla_host_t *ha)
- {
- device_reg_t __iomem *reg;
- uint32_t word;
- reg = ha->iobase;
- /* Release NVRAM write protection. */
- if (IS_QLA2322(ha) || IS_QLA6322(ha)) {
- /* Write enable. */
- qla2x00_nv_write(ha, NVR_DATA_OUT);
- qla2x00_nv_write(ha, 0);
- qla2x00_nv_write(ha, 0);
- for (word = 0; word < 8; word++)
- qla2x00_nv_write(ha, NVR_DATA_OUT);
- qla2x00_nv_deselect(ha);
- /* Enable protection register. */
- qla2x00_nv_write(ha, NVR_PR_ENABLE | NVR_DATA_OUT);
- qla2x00_nv_write(ha, NVR_PR_ENABLE);
- qla2x00_nv_write(ha, NVR_PR_ENABLE);
- for (word = 0; word < 8; word++)
- qla2x00_nv_write(ha, NVR_DATA_OUT | NVR_PR_ENABLE);
- qla2x00_nv_deselect(ha);
- /* Clear protection register (ffff is cleared). */
- qla2x00_nv_write(ha, NVR_PR_ENABLE | NVR_DATA_OUT);
- qla2x00_nv_write(ha, NVR_PR_ENABLE | NVR_DATA_OUT);
- qla2x00_nv_write(ha, NVR_PR_ENABLE | NVR_DATA_OUT);
- for (word = 0; word < 8; word++)
- qla2x00_nv_write(ha, NVR_DATA_OUT | NVR_PR_ENABLE);
- qla2x00_nv_deselect(ha);
- /* Wait for NVRAM to become ready. */
- WRT_REG_WORD(®->nvram, NVR_SELECT);
- do {
- NVRAM_DELAY();
- word = RD_REG_WORD(®->nvram);
- } while ((word & NVR_DATA_IN) == 0);
- }
- }
- /**
- * qla2x00_get_nvram_word() - Calculates word position in NVRAM and calls the
- * request routine to get the word from NVRAM.
- * @ha: HA context
- * @addr: Address in NVRAM to read
- *
- * Returns the word read from nvram @addr.
- */
- uint16_t
- qla2x00_get_nvram_word(scsi_qla_host_t *ha, uint32_t addr)
- {
- uint16_t data;
- uint32_t nv_cmd;
- nv_cmd = addr << 16;
- nv_cmd |= NV_READ_OP;
- data = qla2x00_nvram_request(ha, nv_cmd);
- return (data);
- }
- /**
- * qla2x00_write_nvram_word() - Write NVRAM data.
- * @ha: HA context
- * @addr: Address in NVRAM to write
- * @data: word to program
- */
- void
- qla2x00_write_nvram_word(scsi_qla_host_t *ha, uint32_t addr, uint16_t data)
- {
- int count;
- uint16_t word;
- uint32_t nv_cmd;
- device_reg_t __iomem *reg = ha->iobase;
- qla2x00_nv_write(ha, NVR_DATA_OUT);
- qla2x00_nv_write(ha, 0);
- qla2x00_nv_write(ha, 0);
- for (word = 0; word < 8; word++)
- qla2x00_nv_write(ha, NVR_DATA_OUT);
- qla2x00_nv_deselect(ha);
- /* Write data */
- nv_cmd = (addr << 16) | NV_WRITE_OP;
- nv_cmd |= data;
- nv_cmd <<= 5;
- for (count = 0; count < 27; count++) {
- if (nv_cmd & BIT_31)
- qla2x00_nv_write(ha, NVR_DATA_OUT);
- else
- qla2x00_nv_write(ha, 0);
- nv_cmd <<= 1;
- }
- qla2x00_nv_deselect(ha);
- /* Wait for NVRAM to become ready */
- WRT_REG_WORD(®->nvram, NVR_SELECT);
- do {
- NVRAM_DELAY();
- word = RD_REG_WORD(®->nvram);
- } while ((word & NVR_DATA_IN) == 0);
- qla2x00_nv_deselect(ha);
- /* Disable writes */
- qla2x00_nv_write(ha, NVR_DATA_OUT);
- for (count = 0; count < 10; count++)
- qla2x00_nv_write(ha, 0);
- qla2x00_nv_deselect(ha);
- }
- /**
- * qla2x00_nvram_request() - Sends read command to NVRAM and gets data from
- * NVRAM.
- * @ha: HA context
- * @nv_cmd: NVRAM command
- *
- * Bit definitions for NVRAM command:
- *
- * Bit 26 = start bit
- * Bit 25, 24 = opcode
- * Bit 23-16 = address
- * Bit 15-0 = write data
- *
- * Returns the word read from nvram @addr.
- */
- static uint16_t
- qla2x00_nvram_request(scsi_qla_host_t *ha, uint32_t nv_cmd)
- {
- uint8_t cnt;
- device_reg_t __iomem *reg = ha->iobase;
- uint16_t data = 0;
- uint16_t reg_data;
- /* Send command to NVRAM. */
- nv_cmd <<= 5;
- for (cnt = 0; cnt < 11; cnt++) {
- if (nv_cmd & BIT_31)
- qla2x00_nv_write(ha, NVR_DATA_OUT);
- else
- qla2x00_nv_write(ha, 0);
- nv_cmd <<= 1;
- }
- /* Read data from NVRAM. */
- for (cnt = 0; cnt < 16; cnt++) {
- WRT_REG_WORD(®->nvram, NVR_SELECT | NVR_CLOCK);
- NVRAM_DELAY();
- data <<= 1;
- reg_data = RD_REG_WORD(®->nvram);
- if (reg_data & NVR_DATA_IN)
- data |= BIT_0;
- WRT_REG_WORD(®->nvram, NVR_SELECT);
- RD_REG_WORD(®->nvram); /* PCI Posting. */
- NVRAM_DELAY();
- }
- /* Deselect chip. */
- WRT_REG_WORD(®->nvram, NVR_DESELECT);
- RD_REG_WORD(®->nvram); /* PCI Posting. */
- NVRAM_DELAY();
- return (data);
- }
- /**
- * qla2x00_nv_write() - Clean NVRAM operations.
- * @ha: HA context
- */
- static void
- qla2x00_nv_deselect(scsi_qla_host_t *ha)
- {
- device_reg_t __iomem *reg = ha->iobase;
- WRT_REG_WORD(®->nvram, NVR_DESELECT);
- RD_REG_WORD(®->nvram); /* PCI Posting. */
- NVRAM_DELAY();
- }
- /**
- * qla2x00_nv_write() - Prepare for NVRAM read/write operation.
- * @ha: HA context
- * @data: Serial interface selector
- */
- static void
- qla2x00_nv_write(scsi_qla_host_t *ha, uint16_t data)
- {
- device_reg_t __iomem *reg = ha->iobase;
- WRT_REG_WORD(®->nvram, data | NVR_SELECT | NVR_WRT_ENABLE);
- RD_REG_WORD(®->nvram); /* PCI Posting. */
- NVRAM_DELAY();
- WRT_REG_WORD(®->nvram, data | NVR_SELECT| NVR_CLOCK |
- NVR_WRT_ENABLE);
- RD_REG_WORD(®->nvram); /* PCI Posting. */
- NVRAM_DELAY();
- WRT_REG_WORD(®->nvram, data | NVR_SELECT | NVR_WRT_ENABLE);
- RD_REG_WORD(®->nvram); /* PCI Posting. */
- NVRAM_DELAY();
- }
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