From 809c6ea8abe9f18b74253e6c8c7b23dd73f74b7a Mon Sep 17 00:00:00 2001 From: Xinming Hu Date: Tue, 23 Dec 2014 19:14:11 +0530 Subject: [PATCH] mwifiex: save sdio register values before firmware dump This patch saves sdio registers value before firmware dump, this can be used to find out reason for FW dump. Signed-off-by: Xinming Hu Signed-off-by: Cathy Luo Signed-off-by: Avinash Patil Signed-off-by: Kalle Valo --- drivers/net/wireless/mwifiex/main.c | 6 ++ drivers/net/wireless/mwifiex/main.h | 1 + drivers/net/wireless/mwifiex/sdio.c | 94 +++++++++++++++++++++++++++++ drivers/net/wireless/mwifiex/sdio.h | 26 ++++++++ 4 files changed, 127 insertions(+) diff --git a/drivers/net/wireless/mwifiex/main.c b/drivers/net/wireless/mwifiex/main.c index 4edaaf48259b..6125d1c8ae3a 100644 --- a/drivers/net/wireless/mwifiex/main.c +++ b/drivers/net/wireless/mwifiex/main.c @@ -884,6 +884,12 @@ void mwifiex_dump_drv_info(struct mwifiex_adapter *adapter) priv->netdev->name, priv->num_tx_timeout); } + if (adapter->iface_type == MWIFIEX_SDIO) { + p += sprintf(p, "\n=== SDIO register DUMP===\n"); + if (adapter->if_ops.reg_dump) + p += adapter->if_ops.reg_dump(adapter, p); + } + p += sprintf(p, "\n=== MORE DEBUG INFORMATION\n"); debug_info = kzalloc(sizeof(*debug_info), GFP_KERNEL); if (debug_info) { diff --git a/drivers/net/wireless/mwifiex/main.h b/drivers/net/wireless/mwifiex/main.h index 2f085de1ff63..dd55bc16aeab 100644 --- a/drivers/net/wireless/mwifiex/main.h +++ b/drivers/net/wireless/mwifiex/main.h @@ -724,6 +724,7 @@ struct mwifiex_if_ops { int (*dnld_fw) (struct mwifiex_adapter *, struct mwifiex_fw_image *); void (*card_reset) (struct mwifiex_adapter *); void (*fw_dump)(struct mwifiex_adapter *); + int (*reg_dump)(struct mwifiex_adapter *, char *); int (*clean_pcie_ring) (struct mwifiex_adapter *adapter); void (*iface_work)(struct work_struct *work); void (*submit_rem_rx_urbs)(struct mwifiex_adapter *adapter); diff --git a/drivers/net/wireless/mwifiex/sdio.c b/drivers/net/wireless/mwifiex/sdio.c index 6bdfe67eabab..274a1b2b0365 100644 --- a/drivers/net/wireless/mwifiex/sdio.c +++ b/drivers/net/wireless/mwifiex/sdio.c @@ -2168,6 +2168,99 @@ static void mwifiex_sdio_fw_dump(struct mwifiex_adapter *adapter) schedule_work(&adapter->iface_work); } +/* Function to dump SDIO function registers and SDIO scratch registers in case + * of FW crash + */ +static int +mwifiex_sdio_reg_dump(struct mwifiex_adapter *adapter, char *drv_buf) +{ + char *p = drv_buf; + struct sdio_mmc_card *cardp = adapter->card; + int ret = 0; + u8 count, func, data, index = 0, size = 0; + u8 reg, reg_start, reg_end; + char buf[256], *ptr; + + if (!p) + return 0; + + dev_info(adapter->dev, "SDIO register DUMP START\n"); + + mwifiex_pm_wakeup_card(adapter); + + sdio_claim_host(cardp->func); + + for (count = 0; count < 5; count++) { + memset(buf, 0, sizeof(buf)); + ptr = buf; + + switch (count) { + case 0: + /* Read the registers of SDIO function0 */ + func = count; + reg_start = 0; + reg_end = 9; + break; + case 1: + /* Read the registers of SDIO function1 */ + func = count; + reg_start = cardp->reg->func1_dump_reg_start; + reg_end = cardp->reg->func1_dump_reg_end; + break; + case 2: + index = 0; + func = 1; + reg_start = cardp->reg->func1_spec_reg_table[index++]; + size = cardp->reg->func1_spec_reg_num; + reg_end = cardp->reg->func1_spec_reg_table[size-1]; + break; + default: + /* Read the scratch registers of SDIO function1 */ + if (count == 4) + mdelay(100); + func = 1; + reg_start = cardp->reg->func1_scratch_reg; + reg_end = reg_start + MWIFIEX_SDIO_SCRATCH_SIZE; + } + + if (count != 2) + ptr += sprintf(ptr, "SDIO Func%d (%#x-%#x): ", + func, reg_start, reg_end); + else + ptr += sprintf(ptr, "SDIO Func%d: ", func); + + for (reg = reg_start; reg <= reg_end;) { + if (func == 0) + data = sdio_f0_readb(cardp->func, reg, &ret); + else + data = sdio_readb(cardp->func, reg, &ret); + + if (count == 2) + ptr += sprintf(ptr, "(%#x) ", reg); + if (!ret) { + ptr += sprintf(ptr, "%02x ", data); + } else { + ptr += sprintf(ptr, "ERR"); + break; + } + + if (count == 2 && reg < reg_end) + reg = cardp->reg->func1_spec_reg_table[index++]; + else + reg++; + } + + dev_info(adapter->dev, "%s\n", buf); + p += sprintf(p, "%s\n", buf); + } + + sdio_release_host(cardp->func); + + dev_info(adapter->dev, "SDIO register DUMP END\n"); + + return p - drv_buf; +} + static struct mwifiex_if_ops sdio_ops = { .init_if = mwifiex_init_sdio, .cleanup_if = mwifiex_cleanup_sdio, @@ -2190,6 +2283,7 @@ static struct mwifiex_if_ops sdio_ops = { .card_reset = mwifiex_sdio_card_reset, .iface_work = mwifiex_sdio_work, .fw_dump = mwifiex_sdio_fw_dump, + .reg_dump = mwifiex_sdio_reg_dump, }; /* diff --git a/drivers/net/wireless/mwifiex/sdio.h b/drivers/net/wireless/mwifiex/sdio.h index 54c07156dd78..895eea054c9e 100644 --- a/drivers/net/wireless/mwifiex/sdio.h +++ b/drivers/net/wireless/mwifiex/sdio.h @@ -44,6 +44,9 @@ #define MWIFIEX_SDIO_BYTE_MODE_MASK 0x80000000 +#define MWIFIEX_MAX_FUNC2_REG_NUM 13 +#define MWIFIEX_SDIO_SCRATCH_SIZE 10 + #define SDIO_MPA_ADDR_BASE 0x1000 #define CTRL_PORT 0 #define CTRL_PORT_MASK 0x0001 @@ -219,6 +222,11 @@ struct mwifiex_sdio_card_reg { u8 fw_dump_ctrl; u8 fw_dump_start; u8 fw_dump_end; + u8 func1_dump_reg_start; + u8 func1_dump_reg_end; + u8 func1_scratch_reg; + u8 func1_spec_reg_num; + u8 func1_spec_reg_table[MWIFIEX_MAX_FUNC2_REG_NUM]; }; struct sdio_mmc_card { @@ -291,6 +299,11 @@ static const struct mwifiex_sdio_card_reg mwifiex_reg_sd87xx = { .rd_len_p0_l = 0x08, .rd_len_p0_u = 0x09, .card_misc_cfg_reg = 0x6c, + .func1_dump_reg_start = 0x0, + .func1_dump_reg_end = 0x9, + .func1_scratch_reg = 0x60, + .func1_spec_reg_num = 5, + .func1_spec_reg_table = {0x28, 0x30, 0x34, 0x38, 0x3c}, }; static const struct mwifiex_sdio_card_reg mwifiex_reg_sd8897 = { @@ -335,6 +348,12 @@ static const struct mwifiex_sdio_card_reg mwifiex_reg_sd8897 = { .fw_dump_ctrl = 0xe2, .fw_dump_start = 0xe3, .fw_dump_end = 0xea, + .func1_dump_reg_start = 0x0, + .func1_dump_reg_end = 0xb, + .func1_scratch_reg = 0xc0, + .func1_spec_reg_num = 8, + .func1_spec_reg_table = {0x4C, 0x50, 0x54, 0x55, 0x58, + 0x59, 0x5c, 0x5d}, }; static const struct mwifiex_sdio_card_reg mwifiex_reg_sd8887 = { @@ -376,6 +395,13 @@ static const struct mwifiex_sdio_card_reg mwifiex_reg_sd8887 = { .cmd_cfg_1 = 0xc5, .cmd_cfg_2 = 0xc6, .cmd_cfg_3 = 0xc7, + .func1_dump_reg_start = 0x10, + .func1_dump_reg_end = 0x17, + .func1_scratch_reg = 0x90, + .func1_spec_reg_num = 13, + .func1_spec_reg_table = {0x08, 0x58, 0x5C, 0x5D, 0x60, + 0x61, 0x62, 0x64, 0x65, 0x66, + 0x68, 0x69, 0x6a}, }; static const struct mwifiex_sdio_device mwifiex_sdio_sd8786 = { -- 2.30.2