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path: root/target/linux/brcm47xx/patches-3.3/070-bcma-add-functions-to-write-to-serial-flash.patch
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Diffstat (limited to 'target/linux/brcm47xx/patches-3.3/070-bcma-add-functions-to-write-to-serial-flash.patch')
-rw-r--r--target/linux/brcm47xx/patches-3.3/070-bcma-add-functions-to-write-to-serial-flash.patch345
1 files changed, 0 insertions, 345 deletions
diff --git a/target/linux/brcm47xx/patches-3.3/070-bcma-add-functions-to-write-to-serial-flash.patch b/target/linux/brcm47xx/patches-3.3/070-bcma-add-functions-to-write-to-serial-flash.patch
deleted file mode 100644
index 5acc2cf..0000000
--- a/target/linux/brcm47xx/patches-3.3/070-bcma-add-functions-to-write-to-serial-flash.patch
+++ /dev/null
@@ -1,345 +0,0 @@
---- a/drivers/bcma/driver_chipcommon_sflash.c
-+++ b/drivers/bcma/driver_chipcommon_sflash.c
-@@ -1,15 +1,22 @@
- /*
- * Broadcom specific AMBA
- * ChipCommon serial flash interface
-+ * Copyright 2011, Jonas Gorski <jonas.gorski@gmail.com>
-+ * Copyright 2011, 2012, Hauke Mehrtens <hauke@hauke-m.de>
-+ * Copyright 2010, Broadcom Corporation
- *
- * Licensed under the GNU/GPL. See COPYING for details.
- */
-
- #include <linux/platform_device.h>
-+#include <linux/delay.h>
- #include <linux/bcma/bcma.h>
-+#include <linux/bcma/bcma_driver_chipcommon.h>
-
- #include "bcma_private.h"
-
-+#define NUM_RETRIES 3
-+
- static struct resource bcma_sflash_resource = {
- .name = "bcma_sflash",
- .start = BCMA_SOC_FLASH2,
-@@ -18,7 +25,7 @@ static struct resource bcma_sflash_resou
- };
-
- struct platform_device bcma_sflash_dev = {
-- .name = "bcma_sflash",
-+ .name = "bcm47xx-sflash",
- .resource = &bcma_sflash_resource,
- .num_resources = 1,
- };
-@@ -30,7 +37,7 @@ struct bcma_sflash_tbl_e {
- u16 numblocks;
- };
-
--static struct bcma_sflash_tbl_e bcma_sflash_st_tbl[] = {
-+static const struct bcma_sflash_tbl_e bcma_sflash_st_tbl[] = {
- { "M25P20", 0x11, 0x10000, 4, },
- { "M25P40", 0x12, 0x10000, 8, },
-
-@@ -41,7 +48,7 @@ static struct bcma_sflash_tbl_e bcma_sfl
- { 0 },
- };
-
--static struct bcma_sflash_tbl_e bcma_sflash_sst_tbl[] = {
-+static const struct bcma_sflash_tbl_e bcma_sflash_sst_tbl[] = {
- { "SST25WF512", 1, 0x1000, 16, },
- { "SST25VF512", 0x48, 0x1000, 16, },
- { "SST25WF010", 2, 0x1000, 32, },
-@@ -59,7 +66,7 @@ static struct bcma_sflash_tbl_e bcma_sfl
- { 0 },
- };
-
--static struct bcma_sflash_tbl_e bcma_sflash_at_tbl[] = {
-+static const struct bcma_sflash_tbl_e bcma_sflash_at_tbl[] = {
- { "AT45DB011", 0xc, 256, 512, },
- { "AT45DB021", 0x14, 256, 1024, },
- { "AT45DB041", 0x1c, 256, 2048, },
-@@ -84,12 +91,230 @@ static void bcma_sflash_cmd(struct bcma_
- bcma_err(cc->core->bus, "SFLASH control command failed (timeout)!\n");
- }
-
-+static void bcma_sflash_write_u8(struct bcma_drv_cc *cc, u32 offset, u8 byte)
-+{
-+ bcma_cc_write32(cc, BCMA_CC_FLASHADDR, offset);
-+ bcma_cc_write32(cc, BCMA_CC_FLASHDATA, byte);
-+}
-+
-+/* Read len bytes starting at offset into buf. Returns number of bytes read. */
-+static int bcma_sflash_read(struct bcm47xx_sflash *dev, u32 offset, u32 len, u8 *buf)
-+{
-+ u8 *from, *to;
-+ u32 cnt, i;
-+ struct bcma_drv_cc *cc = dev->bcc;
-+
-+ if (!len)
-+ return 0;
-+
-+ if ((offset + len) > cc->sflash.size)
-+ return -EINVAL;
-+
-+ if ((len >= 4) && (offset & 3))
-+ cnt = 4 - (offset & 3);
-+ else if ((len >= 4) && ((u32)buf & 3))
-+ cnt = 4 - ((u32)buf & 3);
-+ else
-+ cnt = len;
-+
-+ from = (u8 *)KSEG0ADDR(BCMA_SOC_FLASH2 + offset);
-+
-+ to = (u8 *)buf;
-+
-+ if (cnt < 4) {
-+ for (i = 0; i < cnt; i++) {
-+ *to = readb(from);
-+ from++;
-+ to++;
-+ }
-+ return cnt;
-+ }
-+
-+ while (cnt >= 4) {
-+ *(u32 *)to = readl(from);
-+ from += 4;
-+ to += 4;
-+ cnt -= 4;
-+ }
-+
-+ return len - cnt;
-+}
-+
-+/* Poll for command completion. Returns zero when complete. */
-+static int bcma_sflash_poll(struct bcm47xx_sflash *dev, u32 offset)
-+{
-+ struct bcma_drv_cc *cc = dev->bcc;
-+
-+ if (offset >= cc->sflash.size)
-+ return -22;
-+
-+ switch (cc->capabilities & BCMA_CC_CAP_FLASHT) {
-+ case BCMA_CC_FLASHT_STSER:
-+ /* Check for ST Write In Progress bit */
-+ bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_RDSR);
-+ return bcma_cc_read32(cc, BCMA_CC_FLASHDATA)
-+ & BCMA_CC_FLASHDATA_ST_WIP;
-+ case BCMA_CC_FLASHT_ATSER:
-+ /* Check for Atmel Ready bit */
-+ bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_AT_STATUS);
-+ return !(bcma_cc_read32(cc, BCMA_CC_FLASHDATA)
-+ & BCMA_CC_FLASHDATA_AT_READY);
-+ }
-+
-+ return 0;
-+}
-+
-+
-+static int sflash_st_write(struct bcm47xx_sflash *dev, u32 offset, u32 len,
-+ const u8 *buf)
-+{
-+ int written = 1;
-+ struct bcma_drv_cc *cc = dev->bcc;
-+
-+ /* Enable writes */
-+ bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_WREN);
-+ bcma_sflash_write_u8(cc, offset, *buf++);
-+ /* Issue a page program with CSA bit set */
-+ bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_CSA | BCMA_CC_FLASHCTL_ST_PP);
-+ offset++;
-+ len--;
-+ while (len > 0) {
-+ if ((offset & 255) == 0) {
-+ /* Page boundary, poll droping cs and return */
-+ bcma_cc_write32(cc, BCMA_CC_FLASHCTL, 0);
-+ udelay(1);
-+ if (!bcma_sflash_poll(dev, offset)) {
-+ /* Flash rejected command */
-+ return -EAGAIN;
-+ }
-+ return written;
-+ } else {
-+ /* Write single byte */
-+ bcma_sflash_cmd(cc,
-+ BCMA_CC_FLASHCTL_ST_CSA |
-+ *buf++);
-+ }
-+ written++;
-+ offset++;
-+ len--;
-+ }
-+ /* All done, drop cs & poll */
-+ bcma_cc_write32(cc, BCMA_CC_FLASHCTL, 0);
-+ udelay(1);
-+ if (!bcma_sflash_poll(dev, offset)) {
-+ /* Flash rejected command */
-+ return -EAGAIN;
-+ }
-+ return written;
-+}
-+
-+static int sflash_at_write(struct bcm47xx_sflash *dev, u32 offset, u32 len,
-+ const u8 *buf)
-+{
-+ struct bcma_drv_cc *cc = dev->bcc;
-+ u32 page, byte, mask;
-+ int ret = 0;
-+
-+ mask = dev->blocksize - 1;
-+ page = (offset & ~mask) << 1;
-+ byte = offset & mask;
-+ /* Read main memory page into buffer 1 */
-+ if (byte || (len < dev->blocksize)) {
-+ int i = 100;
-+ bcma_cc_write32(cc, BCMA_CC_FLASHADDR, page);
-+ bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_AT_BUF1_LOAD);
-+ /* 250 us for AT45DB321B */
-+ while (i > 0 && bcma_sflash_poll(dev, offset)) {
-+ udelay(10);
-+ i--;
-+ }
-+ BUG_ON(!bcma_sflash_poll(dev, offset));
-+ }
-+ /* Write into buffer 1 */
-+ for (ret = 0; (ret < (int)len) && (byte < dev->blocksize); ret++) {
-+ bcma_sflash_write_u8(cc, byte++, *buf++);
-+ bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_AT_BUF1_WRITE);
-+ }
-+ /* Write buffer 1 into main memory page */
-+ bcma_cc_write32(cc, BCMA_CC_FLASHADDR, page);
-+ bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_AT_BUF1_PROGRAM);
-+
-+ return ret;
-+}
-+
-+/* Write len bytes starting at offset into buf. Returns number of bytes
-+ * written. Caller should poll for completion.
-+ */
-+static int bcma_sflash_write(struct bcm47xx_sflash *dev, u32 offset, u32 len,
-+ const u8 *buf)
-+{
-+ int ret = 0, tries = NUM_RETRIES;
-+ struct bcma_drv_cc *cc = dev->bcc;
-+
-+ if (!len)
-+ return 0;
-+
-+ if ((offset + len) > cc->sflash.size)
-+ return -EINVAL;
-+
-+ switch (cc->capabilities & BCMA_CC_CAP_FLASHT) {
-+ case BCMA_CC_FLASHT_STSER:
-+ do {
-+ ret = sflash_st_write(dev, offset, len, buf);
-+ tries--;
-+ } while (ret == -EAGAIN && tries > 0);
-+
-+ if (ret == -EAGAIN && tries == 0) {
-+ bcma_info(cc->core->bus, "ST Flash rejected write\n");
-+ ret = -EIO;
-+ }
-+ break;
-+ case BCMA_CC_FLASHT_ATSER:
-+ ret = sflash_at_write(dev, offset, len, buf);
-+ break;
-+ }
-+
-+ return ret;
-+}
-+
-+/* Erase a region. Returns number of bytes scheduled for erasure.
-+ * Caller should poll for completion.
-+ */
-+static int bcma_sflash_erase(struct bcm47xx_sflash *dev, u32 offset)
-+{
-+ struct bcma_drv_cc *cc = dev->bcc;
-+
-+ if (offset >= cc->sflash.size)
-+ return -EINVAL;
-+
-+ switch (cc->capabilities & BCMA_CC_CAP_FLASHT) {
-+ case BCMA_CC_FLASHT_STSER:
-+ bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_WREN);
-+ bcma_cc_write32(cc, BCMA_CC_FLASHADDR, offset);
-+ /* Newer flashes have "sub-sectors" which can be erased independently
-+ * with a new command: ST_SSE. The ST_SE command erases 64KB just as
-+ * before.
-+ */
-+ if (dev->blocksize < (64 * 1024))
-+ bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_SSE);
-+ else
-+ bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_SE);
-+ return dev->blocksize;
-+ case BCMA_CC_FLASHT_ATSER:
-+ bcma_cc_write32(cc, BCMA_CC_FLASHADDR, offset << 1);
-+ bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_AT_PAGE_ERASE);
-+ return dev->blocksize;
-+ }
-+
-+ return 0;
-+}
-+
- /* Initialize serial flash access */
- int bcma_sflash_init(struct bcma_drv_cc *cc)
- {
- struct bcma_bus *bus = cc->core->bus;
-- struct bcma_sflash *sflash = &cc->sflash;
-- struct bcma_sflash_tbl_e *e;
-+ struct bcm47xx_sflash *sflash = &cc->sflash;
-+ const struct bcma_sflash_tbl_e *e;
- u32 id, id2;
-
- switch (cc->capabilities & BCMA_CC_CAP_FLASHT) {
-@@ -150,6 +375,12 @@ int bcma_sflash_init(struct bcma_drv_cc
- sflash->numblocks = e->numblocks;
- sflash->size = sflash->blocksize * sflash->numblocks;
- sflash->present = true;
-+ sflash->read = bcma_sflash_read;
-+ sflash->poll = bcma_sflash_poll;
-+ sflash->write = bcma_sflash_write;
-+ sflash->erase = bcma_sflash_erase;
-+ sflash->type = BCM47XX_SFLASH_BCMA;
-+ sflash->bcc = cc;
-
- bcma_info(bus, "Found %s serial flash (size: %dKiB, blocksize: 0x%X, blocks: %d)\n",
- e->name, sflash->size / 1024, sflash->blocksize,
---- a/include/linux/bcma/bcma_driver_chipcommon.h
-+++ b/include/linux/bcma/bcma_driver_chipcommon.h
-@@ -3,6 +3,8 @@
-
- #include <linux/platform_device.h>
-
-+#include <linux/mtd/bcm47xx_sflash.h>
-+
- /** ChipCommon core registers. **/
- #define BCMA_CC_ID 0x0000
- #define BCMA_CC_ID_ID 0x0000FFFF
-@@ -518,17 +520,6 @@ struct bcma_pflash {
- u32 window_size;
- };
-
--#ifdef CONFIG_BCMA_SFLASH
--struct bcma_sflash {
-- bool present;
-- u32 window;
-- u32 blocksize;
-- u16 numblocks;
-- u32 size;
--
-- struct mtd_info *mtd;
--};
--#endif
-
- #ifdef CONFIG_BCMA_NFLASH
- struct mtd_info;
-@@ -563,7 +554,7 @@ struct bcma_drv_cc {
- #ifdef CONFIG_BCMA_DRIVER_MIPS
- struct bcma_pflash pflash;
- #ifdef CONFIG_BCMA_SFLASH
-- struct bcma_sflash sflash;
-+ struct bcm47xx_sflash sflash;
- #endif
- #ifdef CONFIG_BCMA_NFLASH
- struct bcma_nflash nflash;
generated by cgit v1.1 at 2024-12-12 04:35:43 +0000