libertas: [spi] use common firmware request helper and new firmware locations

linux-firmware puts libertas firmware in /libertas.  Fix the driver to
look there first, but fall back to the old firmware names if the new
ones don't exist.  Add preference for newer firmware versions too.

Signed-off-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 69 insertions, 80 deletions

diff --git a/drivers/net/wireless/libertas/if_spi.c b/drivers/net/wireless/libertas/if_spi.c
index 3965c6cf504a..79bcb4e5d2ca 100644
--- a/drivers/net/wireless/libertas/if_spi.c
+++ b/drivers/net/wireless/libertas/if_spi.c
@@ -39,9 +39,6 @@ struct if_spi_card {
         struct lbs_private              *priv;
         struct libertas_spi_platform_data *pdata;
 
-        char                            helper_fw_name[IF_SPI_FW_NAME_MAX];
-        char                            main_fw_name[IF_SPI_FW_NAME_MAX];
-
         /* The card ID and card revision, as reported by the hardware. */
         u16                             card_id;
         u8                              card_rev;
@@ -70,10 +67,28 @@ static void free_if_spi_card(struct if_spi_card *card)
         kfree(card);
 }
 
-static struct chip_ident chip_id_to_device_name[] = {
-        { .chip_id = 0x04, .name = 8385 },
-        { .chip_id = 0x0b, .name = 8686 },
+#define MODEL_8385      0x04
+#define MODEL_8686      0x0b
+#define MODEL_8688      0x10
+
+static const struct lbs_fw_table fw_table[] = {
+        { MODEL_8385, "libertas/gspi8385_helper.bin", "libertas/gspi8385.bin" },
+        { MODEL_8385, "libertas/gspi8385_hlp.bin", "libertas/gspi8385.bin" },
+        { MODEL_8686, "libertas/gspi8686_v9_helper.bin", "libertas/gspi8686_v9.bin" },
+        { MODEL_8686, "libertas/gspi8686_hlp.bin", "libertas/gspi8686.bin" },
+        { MODEL_8688, "libertas/gspi8688_helper.bin", "libertas/gspi8688.bin" },
+        { 0, NULL, NULL }
 };
+MODULE_FIRMWARE("libertas/gspi8385_helper.bin");
+MODULE_FIRMWARE("libertas/gspi8385_hlp.bin");
+MODULE_FIRMWARE("libertas/gspi8385.bin");
+MODULE_FIRMWARE("libertas/gspi8686_v9_helper.bin");
+MODULE_FIRMWARE("libertas/gspi8686_v9.bin");
+MODULE_FIRMWARE("libertas/gspi8686_hlp.bin");
+MODULE_FIRMWARE("libertas/gspi8686.bin");
+MODULE_FIRMWARE("libertas/gspi8688_helper.bin");
+MODULE_FIRMWARE("libertas/gspi8688.bin");
+
 
 /*
  * SPI Interface Unit Routines
@@ -399,26 +414,20 @@ static int spu_init(struct if_spi_card *card, int use_dummy_writes)
  * Firmware Loading
  */
 
-static int if_spi_prog_helper_firmware(struct if_spi_card *card)
+static int if_spi_prog_helper_firmware(struct if_spi_card *card,
+                                        const struct firmware *firmware)
 {
         int err = 0;
-        const struct firmware *firmware = NULL;
         int bytes_remaining;
         const u8 *fw;
         u8 temp[HELPER_FW_LOAD_CHUNK_SZ];
-        struct spi_device *spi = card->spi;
 
         lbs_deb_enter(LBS_DEB_SPI);
 
         err = spu_set_interrupt_mode(card, 1, 0);
         if (err)
                 goto out;
-        /* Get helper firmware image */
-        err = request_firmware(&firmware, card->helper_fw_name, &spi->dev);
-        if (err) {
-                lbs_pr_err("request_firmware failed with err = %d\n", err);
-                goto out;
-        }
+
         bytes_remaining = firmware->size;
         fw = firmware->data;
 
@@ -429,13 +438,13 @@ static int if_spi_prog_helper_firmware(struct if_spi_card *card)
                 err = spu_write_u16(card, IF_SPI_SCRATCH_1_REG,
                                         HELPER_FW_LOAD_CHUNK_SZ);
                 if (err)
-                        goto release_firmware;
+                        goto out;
 
                 err = spu_wait_for_u16(card, IF_SPI_HOST_INT_STATUS_REG,
                                         IF_SPI_HIST_CMD_DOWNLOAD_RDY,
                                         IF_SPI_HIST_CMD_DOWNLOAD_RDY);
                 if (err)
-                        goto release_firmware;
+                        goto out;
 
                 /* Feed the data into the command read/write port reg
                  * in chunks of 64 bytes */
@@ -446,16 +455,16 @@ static int if_spi_prog_helper_firmware(struct if_spi_card *card)
                 err = spu_write(card, IF_SPI_CMD_RDWRPORT_REG,
                                         temp, HELPER_FW_LOAD_CHUNK_SZ);
                 if (err)
-                        goto release_firmware;
+                        goto out;
 
                 /* Interrupt the boot code */
                 err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, 0);
                 if (err)
-                        goto release_firmware;
+                        goto out;
                 err = spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG,
                                        IF_SPI_CIC_CMD_DOWNLOAD_OVER);
                 if (err)
-                        goto release_firmware;
+                        goto out;
                 bytes_remaining -= HELPER_FW_LOAD_CHUNK_SZ;
                 fw += HELPER_FW_LOAD_CHUNK_SZ;
         }
@@ -465,18 +474,16 @@ static int if_spi_prog_helper_firmware(struct if_spi_card *card)
          * bootloader. This completes the helper download. */
         err = spu_write_u16(card, IF_SPI_SCRATCH_1_REG, FIRMWARE_DNLD_OK);
         if (err)
-                goto release_firmware;
+                goto out;
         err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, 0);
         if (err)
-                goto release_firmware;
+                goto out;
         err = spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG,
                                 IF_SPI_CIC_CMD_DOWNLOAD_OVER);
-                goto release_firmware;
+                goto out;
 
         lbs_deb_spi("waiting for helper to boot...\n");
 
-release_firmware:
-        release_firmware(firmware);
 out:
         if (err)
                 lbs_pr_err("failed to load helper firmware (err=%d)\n", err);
@@ -523,13 +530,12 @@ static int if_spi_prog_main_firmware_check_len(struct if_spi_card *card,
         return len;
 }
 
-static int if_spi_prog_main_firmware(struct if_spi_card *card)
+static int if_spi_prog_main_firmware(struct if_spi_card *card,
+                                        const struct firmware *firmware)
 {
         int len, prev_len;
         int bytes, crc_err = 0, err = 0;
-        const struct firmware *firmware = NULL;
         const u8 *fw;
-        struct spi_device *spi = card->spi;
         u16 num_crc_errs;
 
         lbs_deb_enter(LBS_DEB_SPI);
@@ -538,19 +544,11 @@ static int if_spi_prog_main_firmware(struct if_spi_card *card)
         if (err)
                 goto out;
 
-        /* Get firmware image */
-        err = request_firmware(&firmware, card->main_fw_name, &spi->dev);
-        if (err) {
-                lbs_pr_err("%s: can't get firmware '%s' from kernel. "
-                        "err = %d\n", __func__, card->main_fw_name, err);
-                goto out;
-        }
-
         err = spu_wait_for_u16(card, IF_SPI_SCRATCH_1_REG, 0, 0);
         if (err) {
                 lbs_pr_err("%s: timed out waiting for initial "
                            "scratch reg = 0\n", __func__);
-                goto release_firmware;
+                goto out;
         }
 
         num_crc_errs = 0;
@@ -560,7 +558,7 @@ static int if_spi_prog_main_firmware(struct if_spi_card *card)
         while ((len = if_spi_prog_main_firmware_check_len(card, &crc_err))) {
                 if (len < 0) {
                         err = len;
-                        goto release_firmware;
+                        goto out;
                 }
                 if (bytes < 0) {
                         /* If there are no more bytes left, we would normally
@@ -575,7 +573,7 @@ static int if_spi_prog_main_firmware(struct if_spi_card *card)
                                 lbs_pr_err("Too many CRC errors encountered "
                                            "in firmware load.\n");
                                 err = -EIO;
-                                goto release_firmware;
+                                goto out;
                         }
                 } else {
                         /* Previous transfer succeeded. Advance counters. */
@@ -590,15 +588,15 @@ static int if_spi_prog_main_firmware(struct if_spi_card *card)
 
                 err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, 0);
                 if (err)
-                        goto release_firmware;
+                        goto out;
                 err = spu_write(card, IF_SPI_CMD_RDWRPORT_REG,
                                 card->cmd_buffer, len);
                 if (err)
-                        goto release_firmware;
+                        goto out;
                 err = spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG ,
                                         IF_SPI_CIC_CMD_DOWNLOAD_OVER);
                 if (err)
-                        goto release_firmware;
+                        goto out;
                 prev_len = len;
         }
         if (bytes > prev_len) {
@@ -611,12 +609,9 @@ static int if_spi_prog_main_firmware(struct if_spi_card *card)
                                         SUCCESSFUL_FW_DOWNLOAD_MAGIC);
         if (err) {
                 lbs_pr_err("failed to confirm the firmware download\n");
-                goto release_firmware;
+                goto out;
         }
 
-release_firmware:
-        release_firmware(firmware);
-
 out:
         if (err)
                 lbs_pr_err("failed to load firmware (err=%d)\n", err);
@@ -888,37 +883,16 @@ static irqreturn_t if_spi_host_interrupt(int irq, void *dev_id)
  * SPI callbacks
  */
 
-static int if_spi_calculate_fw_names(u16 card_id,
-                              char *helper_fw, char *main_fw)
-{
-        int i;
-        for (i = 0; i < ARRAY_SIZE(chip_id_to_device_name); ++i) {
-                if (card_id == chip_id_to_device_name[i].chip_id)
-                        break;
-        }
-        if (i == ARRAY_SIZE(chip_id_to_device_name)) {
-                lbs_pr_err("Unsupported chip_id: 0x%02x\n", card_id);
-                return -EAFNOSUPPORT;
-        }
-        snprintf(helper_fw, IF_SPI_FW_NAME_MAX, "libertas/gspi%d_hlp.bin",
-                 chip_id_to_device_name[i].name);
-        snprintf(main_fw, IF_SPI_FW_NAME_MAX, "libertas/gspi%d.bin",
-                 chip_id_to_device_name[i].name);
-        return 0;
-}
-MODULE_FIRMWARE("libertas/gspi8385_hlp.bin");
-MODULE_FIRMWARE("libertas/gspi8385.bin");
-MODULE_FIRMWARE("libertas/gspi8686_hlp.bin");
-MODULE_FIRMWARE("libertas/gspi8686.bin");
-
 static int __devinit if_spi_probe(struct spi_device *spi)
 {
         struct if_spi_card *card;
         struct lbs_private *priv = NULL;
         struct libertas_spi_platform_data *pdata = spi->dev.platform_data;
-        int err = 0;
+        int err = 0, i;
         u32 scratch;
         struct sched_param param = { .sched_priority = 1 };
+        const struct firmware *helper = NULL;
+        const struct firmware *mainfw = NULL;
 
         lbs_deb_enter(LBS_DEB_SPI);
 
@@ -963,10 +937,25 @@ static int __devinit if_spi_probe(struct spi_device *spi)
                 lbs_deb_spi("Firmware is already loaded for "
                             "Marvell WLAN 802.11 adapter\n");
         else {
-                err = if_spi_calculate_fw_names(card->card_id,
-                                card->helper_fw_name, card->main_fw_name);
-                if (err)
+                /* Check if we support this card */
+                for (i = 0; i < ARRAY_SIZE(fw_table); i++) {
+                        if (card->card_id == fw_table[i].model)
+                                break;
+                }
+                if (i == ARRAY_SIZE(fw_table)) {
+                        lbs_pr_err("Unsupported chip_id: 0x%02x\n",
+                                        card->card_id);
+                        err = -ENODEV;
                         goto free_card;
+                }
+
+                err = lbs_get_firmware(&card->spi->dev, NULL, NULL,
+                                        card->card_id, &fw_table[0], &helper,
+                                        &mainfw);
+                if (err) {
+                        lbs_pr_err("failed to find firmware (%d)\n", err);
+                        goto free_card;
+                }
 
                 lbs_deb_spi("Initializing FW for Marvell WLAN 802.11 adapter "
                                 "(chip_id = 0x%04x, chip_rev = 0x%02x) "
@@ -975,10 +964,10 @@ static int __devinit if_spi_probe(struct spi_device *spi)
                                 card->card_id, card->card_rev,
                                 spi->master->bus_num, spi->chip_select,
                                 spi->max_speed_hz);
-                err = if_spi_prog_helper_firmware(card);
+                err = if_spi_prog_helper_firmware(card, helper);
                 if (err)
                         goto free_card;
-                err = if_spi_prog_main_firmware(card);
+                err = if_spi_prog_main_firmware(card, mainfw);
                 if (err)
                         goto free_card;
                 lbs_deb_spi("loaded FW for Marvell WLAN 802.11 adapter\n");
@@ -1046,6 +1035,11 @@ remove_card:
 free_card:
         free_if_spi_card(card);
 out:
+        if (helper)
+                release_firmware(helper);
+        if (mainfw)
+                release_firmware(mainfw);
+
         lbs_deb_leave_args(LBS_DEB_SPI, "err %d\n", err);
         return err;
 }
diff --git a/drivers/net/wireless/libertas/if_spi.h b/drivers/net/wireless/libertas/if_spi.h
index f87eec410848..8b1417d3b71b 100644
--- a/drivers/net/wireless/libertas/if_spi.h
+++ b/drivers/net/wireless/libertas/if_spi.h
@@ -25,11 +25,6 @@
 
 #define IF_SPI_FW_NAME_MAX 30
 
-struct chip_ident {
-        u16 chip_id;
-        u16 name;
-};
-
 #define MAX_MAIN_FW_LOAD_CRC_ERR 10
 
 /* Chunk size when loading the helper firmware */