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iwl3945: add load ucode op
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The patch adds 3945 iwl_lib_ops->load_ucode to the driver.

Signed-off-by: Abhijeet Kolekar <abhijeet.kolekar@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Kolekar, Abhijeet authored and John W. Linville committed Jan 29, 2009
1 parent 775a6e2 commit 0164b9b
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Showing 2 changed files with 160 additions and 151 deletions.
159 changes: 159 additions & 0 deletions drivers/net/wireless/iwlwifi/iwl-3945.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -2506,12 +2506,170 @@ void iwl3945_hw_cancel_deferred_work(struct iwl_priv *priv)
cancel_delayed_work(&priv->thermal_periodic);
}

/* check contents of special bootstrap uCode SRAM */
static int iwl3945_verify_bsm(struct iwl_priv *priv)
{
__le32 *image = priv->ucode_boot.v_addr;
u32 len = priv->ucode_boot.len;
u32 reg;
u32 val;

IWL_DEBUG_INFO("Begin verify bsm\n");

/* verify BSM SRAM contents */
val = iwl_read_prph(priv, BSM_WR_DWCOUNT_REG);
for (reg = BSM_SRAM_LOWER_BOUND;
reg < BSM_SRAM_LOWER_BOUND + len;
reg += sizeof(u32), image++) {
val = iwl_read_prph(priv, reg);
if (val != le32_to_cpu(*image)) {
IWL_ERR(priv, "BSM uCode verification failed at "
"addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
BSM_SRAM_LOWER_BOUND,
reg - BSM_SRAM_LOWER_BOUND, len,
val, le32_to_cpu(*image));
return -EIO;
}
}

IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");

return 0;
}

/**
* iwl3945_load_bsm - Load bootstrap instructions
*
* BSM operation:
*
* The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
* in special SRAM that does not power down during RFKILL. When powering back
* up after power-saving sleeps (or during initial uCode load), the BSM loads
* the bootstrap program into the on-board processor, and starts it.
*
* The bootstrap program loads (via DMA) instructions and data for a new
* program from host DRAM locations indicated by the host driver in the
* BSM_DRAM_* registers. Once the new program is loaded, it starts
* automatically.
*
* When initializing the NIC, the host driver points the BSM to the
* "initialize" uCode image. This uCode sets up some internal data, then
* notifies host via "initialize alive" that it is complete.
*
* The host then replaces the BSM_DRAM_* pointer values to point to the
* normal runtime uCode instructions and a backup uCode data cache buffer
* (filled initially with starting data values for the on-board processor),
* then triggers the "initialize" uCode to load and launch the runtime uCode,
* which begins normal operation.
*
* When doing a power-save shutdown, runtime uCode saves data SRAM into
* the backup data cache in DRAM before SRAM is powered down.
*
* When powering back up, the BSM loads the bootstrap program. This reloads
* the runtime uCode instructions and the backup data cache into SRAM,
* and re-launches the runtime uCode from where it left off.
*/
static int iwl3945_load_bsm(struct iwl_priv *priv)
{
__le32 *image = priv->ucode_boot.v_addr;
u32 len = priv->ucode_boot.len;
dma_addr_t pinst;
dma_addr_t pdata;
u32 inst_len;
u32 data_len;
int rc;
int i;
u32 done;
u32 reg_offset;

IWL_DEBUG_INFO("Begin load bsm\n");

/* make sure bootstrap program is no larger than BSM's SRAM size */
if (len > IWL39_MAX_BSM_SIZE)
return -EINVAL;

/* Tell bootstrap uCode where to find the "Initialize" uCode
* in host DRAM ... host DRAM physical address bits 31:0 for 3945.
* NOTE: iwl3945_initialize_alive_start() will replace these values,
* after the "initialize" uCode has run, to point to
* runtime/protocol instructions and backup data cache. */
pinst = priv->ucode_init.p_addr;
pdata = priv->ucode_init_data.p_addr;
inst_len = priv->ucode_init.len;
data_len = priv->ucode_init_data.len;

rc = iwl_grab_nic_access(priv);
if (rc)
return rc;

iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);

/* Fill BSM memory with bootstrap instructions */
for (reg_offset = BSM_SRAM_LOWER_BOUND;
reg_offset < BSM_SRAM_LOWER_BOUND + len;
reg_offset += sizeof(u32), image++)
_iwl_write_prph(priv, reg_offset,
le32_to_cpu(*image));

rc = iwl3945_verify_bsm(priv);
if (rc) {
iwl_release_nic_access(priv);
return rc;
}

/* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
iwl_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
iwl_write_prph(priv, BSM_WR_MEM_DST_REG,
IWL39_RTC_INST_LOWER_BOUND);
iwl_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));

/* Load bootstrap code into instruction SRAM now,
* to prepare to load "initialize" uCode */
iwl_write_prph(priv, BSM_WR_CTRL_REG,
BSM_WR_CTRL_REG_BIT_START);

/* Wait for load of bootstrap uCode to finish */
for (i = 0; i < 100; i++) {
done = iwl_read_prph(priv, BSM_WR_CTRL_REG);
if (!(done & BSM_WR_CTRL_REG_BIT_START))
break;
udelay(10);
}
if (i < 100)
IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
else {
IWL_ERR(priv, "BSM write did not complete!\n");
return -EIO;
}

/* Enable future boot loads whenever power management unit triggers it
* (e.g. when powering back up after power-save shutdown) */
iwl_write_prph(priv, BSM_WR_CTRL_REG,
BSM_WR_CTRL_REG_BIT_START_EN);

iwl_release_nic_access(priv);

return 0;
}

static struct iwl_lib_ops iwl3945_lib = {
.load_ucode = iwl3945_load_bsm,
};

static struct iwl_ops iwl3945_ops = {
.lib = &iwl3945_lib,
};

static struct iwl_cfg iwl3945_bg_cfg = {
.name = "3945BG",
.fw_name_pre = IWL3945_FW_PRE,
.ucode_api_max = IWL3945_UCODE_API_MAX,
.ucode_api_min = IWL3945_UCODE_API_MIN,
.sku = IWL_SKU_G,
.ops = &iwl3945_ops,
.mod_params = &iwl3945_mod_params
};

Expand All @@ -2521,6 +2679,7 @@ static struct iwl_cfg iwl3945_abg_cfg = {
.ucode_api_max = IWL3945_UCODE_API_MAX,
.ucode_api_min = IWL3945_UCODE_API_MIN,
.sku = IWL_SKU_A|IWL_SKU_G,
.ops = &iwl3945_ops,
.mod_params = &iwl3945_mod_params
};

Expand Down
152 changes: 1 addition & 151 deletions drivers/net/wireless/iwlwifi/iwl3945-base.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -4924,156 +4924,6 @@ static int iwl3945_verify_ucode(struct iwl_priv *priv)
return rc;
}


/* check contents of special bootstrap uCode SRAM */
static int iwl3945_verify_bsm(struct iwl_priv *priv)
{
__le32 *image = priv->ucode_boot.v_addr;
u32 len = priv->ucode_boot.len;
u32 reg;
u32 val;

IWL_DEBUG_INFO("Begin verify bsm\n");

/* verify BSM SRAM contents */
val = iwl_read_prph(priv, BSM_WR_DWCOUNT_REG);
for (reg = BSM_SRAM_LOWER_BOUND;
reg < BSM_SRAM_LOWER_BOUND + len;
reg += sizeof(u32), image++) {
val = iwl_read_prph(priv, reg);
if (val != le32_to_cpu(*image)) {
IWL_ERR(priv, "BSM uCode verification failed at "
"addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
BSM_SRAM_LOWER_BOUND,
reg - BSM_SRAM_LOWER_BOUND, len,
val, le32_to_cpu(*image));
return -EIO;
}
}

IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");

return 0;
}

/**
* iwl3945_load_bsm - Load bootstrap instructions
*
* BSM operation:
*
* The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
* in special SRAM that does not power down during RFKILL. When powering back
* up after power-saving sleeps (or during initial uCode load), the BSM loads
* the bootstrap program into the on-board processor, and starts it.
*
* The bootstrap program loads (via DMA) instructions and data for a new
* program from host DRAM locations indicated by the host driver in the
* BSM_DRAM_* registers. Once the new program is loaded, it starts
* automatically.
*
* When initializing the NIC, the host driver points the BSM to the
* "initialize" uCode image. This uCode sets up some internal data, then
* notifies host via "initialize alive" that it is complete.
*
* The host then replaces the BSM_DRAM_* pointer values to point to the
* normal runtime uCode instructions and a backup uCode data cache buffer
* (filled initially with starting data values for the on-board processor),
* then triggers the "initialize" uCode to load and launch the runtime uCode,
* which begins normal operation.
*
* When doing a power-save shutdown, runtime uCode saves data SRAM into
* the backup data cache in DRAM before SRAM is powered down.
*
* When powering back up, the BSM loads the bootstrap program. This reloads
* the runtime uCode instructions and the backup data cache into SRAM,
* and re-launches the runtime uCode from where it left off.
*/
static int iwl3945_load_bsm(struct iwl_priv *priv)
{
__le32 *image = priv->ucode_boot.v_addr;
u32 len = priv->ucode_boot.len;
dma_addr_t pinst;
dma_addr_t pdata;
u32 inst_len;
u32 data_len;
int rc;
int i;
u32 done;
u32 reg_offset;

IWL_DEBUG_INFO("Begin load bsm\n");

/* make sure bootstrap program is no larger than BSM's SRAM size */
if (len > IWL39_MAX_BSM_SIZE)
return -EINVAL;

/* Tell bootstrap uCode where to find the "Initialize" uCode
* in host DRAM ... host DRAM physical address bits 31:0 for 3945.
* NOTE: iwl3945_initialize_alive_start() will replace these values,
* after the "initialize" uCode has run, to point to
* runtime/protocol instructions and backup data cache. */
pinst = priv->ucode_init.p_addr;
pdata = priv->ucode_init_data.p_addr;
inst_len = priv->ucode_init.len;
data_len = priv->ucode_init_data.len;

rc = iwl_grab_nic_access(priv);
if (rc)
return rc;

iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);

/* Fill BSM memory with bootstrap instructions */
for (reg_offset = BSM_SRAM_LOWER_BOUND;
reg_offset < BSM_SRAM_LOWER_BOUND + len;
reg_offset += sizeof(u32), image++)
_iwl_write_prph(priv, reg_offset,
le32_to_cpu(*image));

rc = iwl3945_verify_bsm(priv);
if (rc) {
iwl_release_nic_access(priv);
return rc;
}

/* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
iwl_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
iwl_write_prph(priv, BSM_WR_MEM_DST_REG,
IWL39_RTC_INST_LOWER_BOUND);
iwl_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));

/* Load bootstrap code into instruction SRAM now,
* to prepare to load "initialize" uCode */
iwl_write_prph(priv, BSM_WR_CTRL_REG,
BSM_WR_CTRL_REG_BIT_START);

/* Wait for load of bootstrap uCode to finish */
for (i = 0; i < 100; i++) {
done = iwl_read_prph(priv, BSM_WR_CTRL_REG);
if (!(done & BSM_WR_CTRL_REG_BIT_START))
break;
udelay(10);
}
if (i < 100)
IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
else {
IWL_ERR(priv, "BSM write did not complete!\n");
return -EIO;
}

/* Enable future boot loads whenever power management unit triggers it
* (e.g. when powering back up after power-save shutdown) */
iwl_write_prph(priv, BSM_WR_CTRL_REG,
BSM_WR_CTRL_REG_BIT_START_EN);

iwl_release_nic_access(priv);

return 0;
}

static void iwl3945_nic_start(struct iwl_priv *priv)
{
/* Remove all resets to allow NIC to operate */
Expand Down Expand Up @@ -5714,7 +5564,7 @@ static int __iwl3945_up(struct iwl_priv *priv)
/* load bootstrap state machine,
* load bootstrap program into processor's memory,
* prepare to load the "initialize" uCode */
rc = iwl3945_load_bsm(priv);
priv->cfg->ops->lib->load_ucode(priv);

if (rc) {
IWL_ERR(priv,
Expand Down

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