orinoco_usb: implement fw download

This involves some refactorring of the common fw download code to
substitute ezusb versions of various functions.

Note that WPA-enabled firmwares (9.xx series) will not work fully with
orinoco_usb yet.

Signed-off-by: David Kilroy <kilroyd@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 208 insertions, 0 deletions

diff --git a/drivers/net/wireless/orinoco/hermes.c b/drivers/net/wireless/orinoco/hermes.c
index 845693fb25f3..6c6a23e08df6 100644
--- a/drivers/net/wireless/orinoco/hermes.c
+++ b/drivers/net/wireless/orinoco/hermes.c
@@ -52,6 +52,26 @@
 #define ALLOC_COMPL_TIMEOUT (1000) /* in iterations of ~10us */
 
 /*
+ * AUX port access.  To unlock the AUX port write the access keys to the
+ * PARAM0-2 registers, then write HERMES_AUX_ENABLE to the HERMES_CONTROL
+ * register.  Then read it and make sure it's HERMES_AUX_ENABLED.
+ */
+#define HERMES_AUX_ENABLE       0x8000  /* Enable auxiliary port access */
+#define HERMES_AUX_DISABLE      0x4000  /* Disable to auxiliary port access */
+#define HERMES_AUX_ENABLED      0xC000  /* Auxiliary port is open */
+#define HERMES_AUX_DISABLED     0x0000  /* Auxiliary port is closed */
+
+#define HERMES_AUX_PW0  0xFE01
+#define HERMES_AUX_PW1  0xDC23
+#define HERMES_AUX_PW2  0xBA45
+
+/* HERMES_CMD_DOWNLD */
+#define HERMES_PROGRAM_DISABLE             (0x0000 | HERMES_CMD_DOWNLD)
+#define HERMES_PROGRAM_ENABLE_VOLATILE     (0x0100 | HERMES_CMD_DOWNLD)
+#define HERMES_PROGRAM_ENABLE_NON_VOLATILE (0x0200 | HERMES_CMD_DOWNLD)
+#define HERMES_PROGRAM_NON_VOLATILE        (0x0300 | HERMES_CMD_DOWNLD)
+
+/*
  * Debugging helpers
  */
 
@@ -170,6 +190,7 @@ void hermes_struct_init(hermes_t *hw, void __iomem *address, int reg_spacing)
         hw->iobase = address;
         hw->reg_spacing = reg_spacing;
         hw->inten = 0x0;
+        hw->eeprom_pda = false;
         hw->ops = &hermes_ops_local;
 }
 EXPORT_SYMBOL(hermes_struct_init);
@@ -529,6 +550,189 @@ static int hermes_write_ltv(hermes_t *hw, int bap, u16 rid,
         return err;
 }
 
+/*** Hermes AUX control ***/
+
+static inline void
+hermes_aux_setaddr(hermes_t *hw, u32 addr)
+{
+        hermes_write_reg(hw, HERMES_AUXPAGE, (u16) (addr >> 7));
+        hermes_write_reg(hw, HERMES_AUXOFFSET, (u16) (addr & 0x7F));
+}
+
+static inline int
+hermes_aux_control(hermes_t *hw, int enabled)
+{
+        int desired_state = enabled ? HERMES_AUX_ENABLED : HERMES_AUX_DISABLED;
+        int action = enabled ? HERMES_AUX_ENABLE : HERMES_AUX_DISABLE;
+        int i;
+
+        /* Already open? */
+        if (hermes_read_reg(hw, HERMES_CONTROL) == desired_state)
+                return 0;
+
+        hermes_write_reg(hw, HERMES_PARAM0, HERMES_AUX_PW0);
+        hermes_write_reg(hw, HERMES_PARAM1, HERMES_AUX_PW1);
+        hermes_write_reg(hw, HERMES_PARAM2, HERMES_AUX_PW2);
+        hermes_write_reg(hw, HERMES_CONTROL, action);
+
+        for (i = 0; i < 20; i++) {
+                udelay(10);
+                if (hermes_read_reg(hw, HERMES_CONTROL) ==
+                    desired_state)
+                        return 0;
+        }
+
+        return -EBUSY;
+}
+
+/*** Hermes programming ***/
+
+/* About to start programming data (Hermes I)
+ * offset is the entry point
+ *
+ * Spectrum_cs' Symbol fw does not require this
+ * wl_lkm Agere fw does
+ * Don't know about intersil
+ */
+static int hermesi_program_init(hermes_t *hw, u32 offset)
+{
+        int err;
+
+        /* Disable interrupts?*/
+        /*hw->inten = 0x0;*/
+        /*hermes_write_regn(hw, INTEN, 0);*/
+        /*hermes_set_irqmask(hw, 0);*/
+
+        /* Acknowledge any outstanding command */
+        hermes_write_regn(hw, EVACK, 0xFFFF);
+
+        /* Using init_cmd_wait rather than cmd_wait */
+        err = hw->ops->init_cmd_wait(hw,
+                                     0x0100 | HERMES_CMD_INIT,
+                                     0, 0, 0, NULL);
+        if (err)
+                return err;
+
+        err = hw->ops->init_cmd_wait(hw,
+                                     0x0000 | HERMES_CMD_INIT,
+                                     0, 0, 0, NULL);
+        if (err)
+                return err;
+
+        err = hermes_aux_control(hw, 1);
+        pr_debug("AUX enable returned %d\n", err);
+
+        if (err)
+                return err;
+
+        pr_debug("Enabling volatile, EP 0x%08x\n", offset);
+        err = hw->ops->init_cmd_wait(hw,
+                                     HERMES_PROGRAM_ENABLE_VOLATILE,
+                                     offset & 0xFFFFu,
+                                     offset >> 16,
+                                     0,
+                                     NULL);
+        pr_debug("PROGRAM_ENABLE returned %d\n", err);
+
+        return err;
+}
+
+/* Done programming data (Hermes I)
+ *
+ * Spectrum_cs' Symbol fw does not require this
+ * wl_lkm Agere fw does
+ * Don't know about intersil
+ */
+static int hermesi_program_end(hermes_t *hw)
+{
+        struct hermes_response resp;
+        int rc = 0;
+        int err;
+
+        rc = hw->ops->cmd_wait(hw, HERMES_PROGRAM_DISABLE, 0, &resp);
+
+        pr_debug("PROGRAM_DISABLE returned %d, "
+                 "r0 0x%04x, r1 0x%04x, r2 0x%04x\n",
+                 rc, resp.resp0, resp.resp1, resp.resp2);
+
+        if ((rc == 0) &&
+            ((resp.status & HERMES_STATUS_CMDCODE) != HERMES_CMD_DOWNLD))
+                rc = -EIO;
+
+        err = hermes_aux_control(hw, 0);
+        pr_debug("AUX disable returned %d\n", err);
+
+        /* Acknowledge any outstanding command */
+        hermes_write_regn(hw, EVACK, 0xFFFF);
+
+        /* Reinitialise, ignoring return */
+        (void) hw->ops->init_cmd_wait(hw, 0x0000 | HERMES_CMD_INIT,
+                                      0, 0, 0, NULL);
+
+        return rc ? rc : err;
+}
+
+static int hermes_program_bytes(struct hermes *hw, const char *data,
+                                u32 addr, u32 len)
+{
+        /* wl lkm splits the programming into chunks of 2000 bytes.
+         * This restriction appears to come from USB. The PCMCIA
+         * adapters can program the whole lot in one go */
+        hermes_aux_setaddr(hw, addr);
+        hermes_write_bytes(hw, HERMES_AUXDATA, data, len);
+        return 0;
+}
+
+/* Read PDA from the adapter */
+static int hermes_read_pda(hermes_t *hw, __le16 *pda, u32 pda_addr, u16 pda_len)
+{
+        int ret;
+        u16 pda_size;
+        u16 data_len = pda_len;
+        __le16 *data = pda;
+
+        if (hw->eeprom_pda) {
+                /* PDA of spectrum symbol is in eeprom */
+
+                /* Issue command to read EEPROM */
+                ret = hw->ops->cmd_wait(hw, HERMES_CMD_READMIF, 0, NULL);
+                if (ret)
+                        return ret;
+        } else {
+                /* wl_lkm does not include PDA size in the PDA area.
+                 * We will pad the information into pda, so other routines
+                 * don't have to be modified */
+                pda[0] = cpu_to_le16(pda_len - 2);
+                        /* Includes CFG_PROD_DATA but not itself */
+                pda[1] = cpu_to_le16(0x0800); /* CFG_PROD_DATA */
+                data_len = pda_len - 4;
+                data = pda + 2;
+        }
+
+        /* Open auxiliary port */
+        ret = hermes_aux_control(hw, 1);
+        pr_debug("AUX enable returned %d\n", ret);
+        if (ret)
+                return ret;
+
+        /* Read PDA */
+        hermes_aux_setaddr(hw, pda_addr);
+        hermes_read_words(hw, HERMES_AUXDATA, data, data_len / 2);
+
+        /* Close aux port */
+        ret = hermes_aux_control(hw, 0);
+        pr_debug("AUX disable returned %d\n", ret);
+
+        /* Check PDA length */
+        pda_size = le16_to_cpu(pda[0]);
+        pr_debug("Actual PDA length %d, Max allowed %d\n",
+                 pda_size, pda_len);
+        if (pda_size > pda_len)
+                return -EINVAL;
+
+        return 0;
+}
+
 static void hermes_lock_irqsave(spinlock_t *lock,
                                 unsigned long *flags) __acquires(lock)
 {
@@ -561,6 +765,10 @@ static const struct hermes_ops hermes_ops_local = {
         .write_ltv = hermes_write_ltv,
         .bap_pread = hermes_bap_pread,
         .bap_pwrite = hermes_bap_pwrite,
+        .read_pda = hermes_read_pda,
+        .program_init = hermesi_program_init,
+        .program_end = hermesi_program_end,
+        .program = hermes_program_bytes,
         .lock_irqsave = hermes_lock_irqsave,
         .unlock_irqrestore = hermes_unlock_irqrestore,
         .lock_irq = hermes_lock_irq,