aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/brcm47xx/patches-3.9/060-ssb-add-serial-flash-driver.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/brcm47xx/patches-3.9/060-ssb-add-serial-flash-driver.patch')
-rw-r--r--target/linux/brcm47xx/patches-3.9/060-ssb-add-serial-flash-driver.patch337
1 files changed, 0 insertions, 337 deletions
diff --git a/target/linux/brcm47xx/patches-3.9/060-ssb-add-serial-flash-driver.patch b/target/linux/brcm47xx/patches-3.9/060-ssb-add-serial-flash-driver.patch
deleted file mode 100644
index dcb70e87b9..0000000000
--- a/target/linux/brcm47xx/patches-3.9/060-ssb-add-serial-flash-driver.patch
+++ /dev/null
@@ -1,337 +0,0 @@
---- a/drivers/ssb/Kconfig
-+++ b/drivers/ssb/Kconfig
-@@ -139,7 +139,7 @@ config SSB_DRIVER_MIPS
-
- config SSB_SFLASH
- bool "SSB serial flash support"
-- depends on SSB_DRIVER_MIPS && BROKEN
-+ depends on SSB_DRIVER_MIPS
- default y
-
- # Assumption: We are on embedded, if we compile the MIPS core.
---- a/drivers/ssb/driver_chipcommon_sflash.c
-+++ b/drivers/ssb/driver_chipcommon_sflash.c
-@@ -1,14 +1,22 @@
- /*
- * Sonics Silicon Backplane
- * 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/ssb/ssb.h>
-+#include <linux/ssb/ssb_driver_chipcommon.h>
-
- #include "ssb_private.h"
-
-+#define NUM_RETRIES 3
-+
- static struct resource ssb_sflash_resource = {
- .name = "ssb_sflash",
- .start = SSB_FLASH2,
-@@ -17,7 +25,7 @@ static struct resource ssb_sflash_resour
- };
-
- struct platform_device ssb_sflash_dev = {
-- .name = "ssb_sflash",
-+ .name = "bcm47xx-sflash",
- .resource = &ssb_sflash_resource,
- .num_resources = 1,
- };
-@@ -83,10 +91,185 @@ static void ssb_sflash_cmd(struct ssb_ch
- pr_err("SFLASH control command failed (timeout)!\n");
- }
-
-+static void ssb_sflash_write_u8(struct ssb_chipcommon *chipco, u32 offset, u8 byte)
-+{
-+ chipco_write32(chipco, SSB_CHIPCO_FLASHADDR, offset);
-+ chipco_write32(chipco, SSB_CHIPCO_FLASHDATA, byte);
-+}
-+
-+/* Poll for command completion. Returns zero when complete. */
-+static int ssb_sflash_poll(struct bcm47xxsflash *dev, u32 offset)
-+{
-+ struct ssb_chipcommon *chipco = dev->scc;
-+
-+ if (offset >= chipco->sflash.size)
-+ return -22;
-+
-+ switch (chipco->capabilities & SSB_CHIPCO_CAP_FLASHT) {
-+ case SSB_CHIPCO_FLASHT_STSER:
-+ /* Check for ST Write In Progress bit */
-+ ssb_sflash_cmd(chipco, SSB_CHIPCO_FLASHCTL_ST_RDSR);
-+ return chipco_read32(chipco, SSB_CHIPCO_FLASHDATA)
-+ & SSB_CHIPCO_FLASHDATA_ST_WIP;
-+ case SSB_CHIPCO_FLASHT_ATSER:
-+ /* Check for Atmel Ready bit */
-+ ssb_sflash_cmd(chipco, SSB_CHIPCO_FLASHCTL_AT_STATUS);
-+ return !(chipco_read32(chipco, SSB_CHIPCO_FLASHDATA)
-+ & SSB_CHIPCO_FLASHDATA_AT_READY);
-+ }
-+
-+ return 0;
-+}
-+
-+
-+static int sflash_st_write(struct bcm47xxsflash *dev, u32 offset, u32 len,
-+ const u8 *buf)
-+{
-+ int written = 1;
-+ struct ssb_chipcommon *chipco = dev->scc;
-+
-+ /* Enable writes */
-+ ssb_sflash_cmd(chipco, SSB_CHIPCO_FLASHCTL_ST_WREN);
-+ ssb_sflash_write_u8(chipco, offset, *buf++);
-+ /* Issue a page program with CSA bit set */
-+ ssb_sflash_cmd(chipco, SSB_CHIPCO_FLASHCTL_ST_CSA | SSB_CHIPCO_FLASHCTL_ST_PP);
-+ offset++;
-+ len--;
-+ while (len > 0) {
-+ if ((offset & 255) == 0) {
-+ /* Page boundary, poll droping cs and return */
-+ chipco_write32(chipco, SSB_CHIPCO_FLASHCTL, 0);
-+ udelay(1);
-+ if (!ssb_sflash_poll(dev, offset)) {
-+ /* Flash rejected command */
-+ return -EAGAIN;
-+ }
-+ return written;
-+ } else {
-+ /* Write single byte */
-+ ssb_sflash_cmd(chipco,
-+ SSB_CHIPCO_FLASHCTL_ST_CSA |
-+ *buf++);
-+ }
-+ written++;
-+ offset++;
-+ len--;
-+ }
-+ /* All done, drop cs & poll */
-+ chipco_write32(chipco, SSB_CHIPCO_FLASHCTL, 0);
-+ udelay(1);
-+ if (!ssb_sflash_poll(dev, offset)) {
-+ /* Flash rejected command */
-+ return -EAGAIN;
-+ }
-+ return written;
-+}
-+
-+static int sflash_at_write(struct bcm47xxsflash *dev, u32 offset, u32 len,
-+ const u8 *buf)
-+{
-+ struct ssb_chipcommon *chipco = dev->scc;
-+ 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;
-+ chipco_write32(chipco, SSB_CHIPCO_FLASHADDR, page);
-+ ssb_sflash_cmd(chipco, SSB_CHIPCO_FLASHCTL_AT_BUF1_LOAD);
-+ /* 250 us for AT45DB321B */
-+ while (i > 0 && ssb_sflash_poll(dev, offset)) {
-+ udelay(10);
-+ i--;
-+ }
-+ BUG_ON(!ssb_sflash_poll(dev, offset));
-+ }
-+ /* Write into buffer 1 */
-+ for (ret = 0; (ret < (int)len) && (byte < dev->blocksize); ret++) {
-+ ssb_sflash_write_u8(chipco, byte++, *buf++);
-+ ssb_sflash_cmd(chipco, SSB_CHIPCO_FLASHCTL_AT_BUF1_WRITE);
-+ }
-+ /* Write buffer 1 into main memory page */
-+ chipco_write32(chipco, SSB_CHIPCO_FLASHADDR, page);
-+ ssb_sflash_cmd(chipco, SSB_CHIPCO_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 ssb_sflash_write(struct bcm47xxsflash *dev, u32 offset, u32 len,
-+ const u8 *buf)
-+{
-+ int ret = 0, tries = NUM_RETRIES;
-+ struct ssb_chipcommon *chipco = dev->scc;
-+
-+ if (!len)
-+ return 0;
-+
-+ if ((offset + len) > chipco->sflash.size)
-+ return -EINVAL;
-+
-+ switch (chipco->capabilities & SSB_CHIPCO_CAP_FLASHT) {
-+ case SSB_CHIPCO_FLASHT_STSER:
-+ do {
-+ ret = sflash_st_write(dev, offset, len, buf);
-+ tries--;
-+ } while (ret == -EAGAIN && tries > 0);
-+
-+ if (ret == -EAGAIN && tries == 0) {
-+ pr_info("ST Flash rejected write\n");
-+ ret = -EIO;
-+ }
-+ break;
-+ case SSB_CHIPCO_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 ssb_sflash_erase(struct bcm47xxsflash *dev, u32 offset)
-+{
-+ struct ssb_chipcommon *chipco = dev->scc;
-+
-+ if (offset >= chipco->sflash.size)
-+ return -EINVAL;
-+
-+ switch (chipco->capabilities & SSB_CHIPCO_CAP_FLASHT) {
-+ case SSB_CHIPCO_FLASHT_STSER:
-+ ssb_sflash_cmd(chipco, SSB_CHIPCO_FLASHCTL_ST_WREN);
-+ chipco_write32(chipco, SSB_CHIPCO_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))
-+ ssb_sflash_cmd(chipco, SSB_CHIPCO_FLASHCTL_ST_SSE);
-+ else
-+ ssb_sflash_cmd(chipco, SSB_CHIPCO_FLASHCTL_ST_SE);
-+ return dev->blocksize;
-+ case SSB_CHIPCO_FLASHT_ATSER:
-+ chipco_write32(chipco, SSB_CHIPCO_FLASHADDR, offset << 1);
-+ ssb_sflash_cmd(chipco, SSB_CHIPCO_FLASHCTL_AT_PAGE_ERASE);
-+ return dev->blocksize;
-+ }
-+
-+ return 0;
-+}
-+
- /* Initialize serial flash access */
- int ssb_sflash_init(struct ssb_chipcommon *cc)
- {
-- struct ssb_sflash *sflash = &cc->dev->bus->mipscore.sflash;
-+ struct bcm47xxsflash *sflash = &cc->sflash;
- const struct ssb_sflash_tbl_e *e;
- u32 id, id2;
-
-@@ -150,17 +333,21 @@ int ssb_sflash_init(struct ssb_chipcommo
- sflash->numblocks = e->numblocks;
- sflash->size = sflash->blocksize * sflash->numblocks;
- sflash->present = true;
--
-- pr_info("Found %s serial flash (blocksize: 0x%X, blocks: %d)\n",
-- e->name, e->blocksize, e->numblocks);
-+ sflash->poll = ssb_sflash_poll;
-+ sflash->write = ssb_sflash_write;
-+ sflash->erase = ssb_sflash_erase;
-+ sflash->type = BCM47XX_SFLASH_SSB;
-+ sflash->scc = cc;
-+
-+ pr_info("Found %s serial flash (size: %dKiB, blocksize: 0x%X, blocks: %d)\n",
-+ e->name, sflash->size / 1024, sflash->blocksize,
-+ sflash->numblocks);
-
- /* Prepare platform device, but don't register it yet. It's too early,
- * malloc (required by device_private_init) is not available yet. */
- ssb_sflash_dev.resource[0].end = ssb_sflash_dev.resource[0].start +
-- sflash->size;
-+ sflash->size;
- ssb_sflash_dev.dev.platform_data = sflash;
-
-- pr_err("Serial flash support is not implemented yet!\n");
--
-- return -ENOTSUPP;
-+ return 0;
- }
---- a/drivers/ssb/main.c
-+++ b/drivers/ssb/main.c
-@@ -545,6 +545,15 @@ static int ssb_devices_register(struct s
- dev_idx++;
- }
-
-+#ifdef CONFIG_SSB_SFLASH
-+ if (bus->chipco.sflash.present) {
-+ err = platform_device_register(&ssb_sflash_dev);
-+ if (err)
-+ ssb_printk(KERN_ERR PFX
-+ "Error registering serial flash\n");
-+ }
-+#endif
-+
- #ifdef CONFIG_SSB_DRIVER_MIPS
- if (bus->mipscore.pflash.present) {
- err = platform_device_register(&ssb_pflash_dev);
---- a/drivers/ssb/ssb_private.h
-+++ b/drivers/ssb/ssb_private.h
-@@ -231,6 +231,7 @@ extern u32 ssb_chipco_watchdog_timer_set
- /* driver_chipcommon_sflash.c */
- #ifdef CONFIG_SSB_SFLASH
- int ssb_sflash_init(struct ssb_chipcommon *cc);
-+extern struct platform_device ssb_sflash_dev;
- #else
- static inline int ssb_sflash_init(struct ssb_chipcommon *cc)
- {
---- a/include/linux/ssb/ssb_driver_chipcommon.h
-+++ b/include/linux/ssb/ssb_driver_chipcommon.h
-@@ -13,6 +13,8 @@
- * Licensed under the GPL version 2. See COPYING for details.
- */
-
-+#include <linux/mtd/bcm47xxsflash.h>
-+
- /** ChipCommon core registers. **/
-
- #define SSB_CHIPCO_CHIPID 0x0000
-@@ -121,6 +123,17 @@
- #define SSB_CHIPCO_FLASHCTL_BUSY SSB_CHIPCO_FLASHCTL_START
- #define SSB_CHIPCO_FLASHADDR 0x0044
- #define SSB_CHIPCO_FLASHDATA 0x0048
-+/* Status register bits for ST flashes */
-+#define SSB_CHIPCO_FLASHDATA_ST_WIP 0x01 /* Write In Progress */
-+#define SSB_CHIPCO_FLASHDATA_ST_WEL 0x02 /* Write Enable Latch */
-+#define SSB_CHIPCO_FLASHDATA_ST_BP_MASK 0x1c /* Block Protect */
-+#define SSB_CHIPCO_FLASHDATA_ST_BP_SHIFT 2
-+#define SSB_CHIPCO_FLASHDATA_ST_SRWD 0x80 /* Status Register Write Disable */
-+/* Status register bits for Atmel flashes */
-+#define SSB_CHIPCO_FLASHDATA_AT_READY 0x80
-+#define SSB_CHIPCO_FLASHDATA_AT_MISMATCH 0x40
-+#define SSB_CHIPCO_FLASHDATA_AT_ID_MASK 0x38
-+#define SSB_CHIPCO_FLASHDATA_AT_ID_SHIFT 3
- #define SSB_CHIPCO_BCAST_ADDR 0x0050
- #define SSB_CHIPCO_BCAST_DATA 0x0054
- #define SSB_CHIPCO_GPIOPULLUP 0x0058 /* Rev >= 20 only */
-@@ -504,7 +517,7 @@
- #define SSB_CHIPCO_FLASHCTL_ST_PP 0x0302 /* Page Program */
- #define SSB_CHIPCO_FLASHCTL_ST_SE 0x02D8 /* Sector Erase */
- #define SSB_CHIPCO_FLASHCTL_ST_BE 0x00C7 /* Bulk Erase */
--#define SSB_CHIPCO_FLASHCTL_ST_DP 0x00B9 /* Deep Power-down */
-+#define SSB_CHIPCO_FLASHCTL_ST_DP 0x00D9 /* Deep Power-down */
- #define SSB_CHIPCO_FLASHCTL_ST_RES 0x03AB /* Read Electronic Signature */
- #define SSB_CHIPCO_FLASHCTL_ST_CSA 0x1000 /* Keep chip select asserted */
- #define SSB_CHIPCO_FLASHCTL_ST_SSE 0x0220 /* Sub-sector Erase */
-@@ -595,6 +608,9 @@ struct ssb_chipcommon {
- struct ssb_chipcommon_pmu pmu;
- u32 ticks_per_ms;
- u32 max_timer_ms;
-+#ifdef CONFIG_SSB_SFLASH
-+ struct bcm47xxsflash sflash;
-+#endif
- };
-
- static inline bool ssb_chipco_available(struct ssb_chipcommon *cc)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-14 08:26:07 +0000