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cw1200: Rework SDIO platform support to prevent build problems.

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Based on discussions with And Bergmann, this patch changes the SDIO
platform code to default to supporting the Sagrad devices, allowing for
it to be overridden in board setup code.  This renders the cw1200_sagrad
module suplerflous, so it is now removed.

It also moves the documentation that was in the cw1200_sagrad source to
the platform header.

Signed-off-by: Solomon Peachy <pizza@shaftnet.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Solomon Peachy 2013-06-02 11:35:31 -04:00 committed by John W. Linville
parent 6dd64a304e
commit 7c0b6f49db
5 changed files with 66 additions and 122 deletions
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17
drivers/net/wireless/cw1200/Kconfig
View File

@ -13,20 +13,19 @@ config CW1200_WLAN_SDIO
depends on CW1200 && MMC
help
Enable support for the CW1200 connected via an SDIO bus.
By default this driver only supports the Sagrad SG901-1091/1098 EVK
and similar designs that utilize a hardware reset circuit. To
support different CW1200 SDIO designs you will need to override
the default platform data by calling cw1200_sdio_set_platform_data()
in your board setup file.
config CW1200_WLAN_SPI
tristate "Support SPI platforms"
depends on CW1200 && SPI
help
Enables support for the CW1200 connected via a SPI bus.
config CW1200_WLAN_SAGRAD
tristate "Support Sagrad SG901-1091/1098 modules"
depends on CW1200_WLAN_SDIO
help
This provides the platform data glue to support the
Sagrad SG901-1091/1098 modules in their standard SDIO EVK.
It also includes example SPI platform data.
Enables support for the CW1200 connected via a SPI bus. You will
need to add appropriate platform data glue in your board setup
file.
menu "Driver debug features"
depends on CW1200 && DEBUG_FS

2
drivers/net/wireless/cw1200/Makefile
View File

@ -16,9 +16,7 @@ cw1200_core-$(CONFIG_PM) += pm.o
cw1200_wlan_sdio-y := cw1200_sdio.o
cw1200_wlan_spi-y := cw1200_spi.o
cw1200_wlan_sagrad-y := cw1200_sagrad.o
obj-$(CONFIG_CW1200) += cw1200_core.o
obj-$(CONFIG_CW1200_WLAN_SDIO) += cw1200_wlan_sdio.o
obj-$(CONFIG_CW1200_WLAN_SPI) += cw1200_wlan_spi.o
obj-$(CONFIG_CW1200_WLAN_SAGRAD) += cw1200_wlan_sagrad.o

106
drivers/net/wireless/cw1200/cw1200_sagrad.c
View File

@ -1,106 +0,0 @@
/*
* Platform glue data for ST-Ericsson CW1200 driver
*
* Copyright (c) 2013, Sagrad, Inc
* Author: Solomon Peachy <speachy@sagrad.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/platform_data/cw1200_platform.h>
MODULE_AUTHOR("Solomon Peachy <speachy@sagrad.com>");
MODULE_DESCRIPTION("ST-Ericsson CW1200 Platform glue driver");
MODULE_LICENSE("GPL");
/* Define just one of these. Feel free to customize as needed */
#define SAGRAD_1091_1098_EVK_SDIO
/* #define SAGRAD_1091_1098_EVK_SPI */
#ifdef SAGRAD_1091_1098_EVK_SDIO
static int cw1200_power_ctrl(const struct cw1200_platform_data_sdio *pdata,
bool enable)
{
/* Control 3v3 and 1v8 to hardware as appropriate */
/* Note this is not needed if it's controlled elsewhere or always on */
/* May require delay for power to stabilize */
return 0;
}
static int cw1200_clk_ctrl(const struct cw1200_platform_data_sdio *pdata,
bool enable)
{
/* Turn CLK_32K off and on as appropriate. */
/* Note this is not needed if it's always on */
/* May require delay for clock to stabilize */
return 0;
}
static struct cw1200_platform_data_sdio cw1200_platform_data = {
.ref_clk = 38400,
.have_5ghz = false,
#if 0
.reset = GPIO_RF_RESET, /* Replace as appropriate */
.powerup = GPIO_RF_POWERUP, /* Replace as appropriate */
.irq = GPIO_TO_IRQ(GPIO_RF_IRQ), /* Replace as appropriate */
#endif
.power_ctrl = cw1200_power_ctrl,
.clk_ctrl = cw1200_clk_ctrl,
/* .macaddr = ??? */
.sdd_file = "sdd_sagrad_1091_1098.bin",
};
#endif
#ifdef SAGRAD_1091_1098_EVK_SPI
static int cw1200_power_ctrl(const struct cw1200_platform_data_spi *pdata,
bool enable)
{
/* Control 3v3 and 1v8 to hardware as appropriate */
/* Note this is not needed if it's controlled elsewhere or always on */
/* May require delay for power to stabilize */
return 0;
}
static int cw1200_clk_ctrl(const struct cw1200_platform_data_spi *pdata,
bool enable)
{
/* Turn CLK_32K off and on as appropriate. */
/* Note this is not needed if it's always on */
/* May require delay for clock to stabilize */
return 0;
}
static struct cw1200_platform_data_spi cw1200_platform_data = {
.ref_clk = 38400,
.spi_bits_per_word = 16,
.reset = GPIO_RF_RESET, /* Replace as appropriate */
.powerup = GPIO_RF_POWERUP, /* Replace as appropriate */
.power_ctrl = cw1200_power_ctrl,
.clk_ctrl = cw1200_clk_ctrl,
/* .macaddr = ??? */
.sdd_file = "sdd_sagrad_1091_1098.bin",
};
static struct spi_board_info myboard_spi_devices[] __initdata = {
{
.modalias = "cw1200_wlan_spi",
.max_speed_hz = 10000000, /* 52MHz Max */
.bus_num = 0,
.irq = WIFI_IRQ,
.platform_data = &cw1200_platform_data,
.chip_select = 0,
},
};
#endif
const void *cw1200_get_platform_data(void)
{
return &cw1200_platform_data;
}
EXPORT_SYMBOL_GPL(cw1200_get_platform_data);

26
drivers/net/wireless/cw1200/cw1200_sdio.c
View File

@ -29,6 +29,21 @@ MODULE_LICENSE("GPL");
#define SDIO_BLOCK_SIZE (512)
/* Default platform data for Sagrad modules */
static struct cw1200_platform_data_sdio sagrad_109x_evk_platform_data = {
.ref_clk = 38400,
.have_5ghz = false,
.sdd_file = "sdd_sagrad_1091_1098.bin",
};
/* Allow platform data to be overridden */
static struct cw1200_platform_data_sdio *global_plat_data = &sagrad_109x_evk_platform_data;
void __init cw1200_sdio_set_platform_data(struct cw1200_platform_data_sdio *pdata)
{
global_plat_data = pdata;
}
struct hwbus_priv {
struct sdio_func *func;
struct cw1200_common *core;
@ -261,7 +276,7 @@ static struct hwbus_ops cw1200_sdio_hwbus_ops = {
/* Probe Function to be called by SDIO stack when device is discovered */
static int cw1200_sdio_probe(struct sdio_func *func,
const struct sdio_device_id *id)
const struct sdio_device_id *id)
{
struct hwbus_priv *self;
int status;
@ -280,7 +295,7 @@ static int cw1200_sdio_probe(struct sdio_func *func,
func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
self->pdata = cw1200_get_platform_data();
self->pdata = global_plat_data; /* FIXME */
self->func = func;
sdio_set_drvdata(func, self);
sdio_claim_host(func);
@ -374,7 +389,8 @@ static int __init cw1200_sdio_init(void)
const struct cw1200_platform_data_sdio *pdata;
int ret;
pdata = cw1200_get_platform_data();
/* FIXME -- this won't support multiple devices */
pdata = global_plat_data;
if (cw1200_sdio_on(pdata)) {
ret = -1;
@ -396,7 +412,9 @@ err:
static void __exit cw1200_sdio_exit(void)
{
const struct cw1200_platform_data_sdio *pdata;
pdata = cw1200_get_platform_data();
/* FIXME -- this won't support multiple devices */
pdata = global_plat_data;
sdio_unregister_driver(&sdio_driver);
cw1200_sdio_off(pdata);
}

37
include/linux/platform_data/cw1200_platform.h
View File

@ -41,6 +41,41 @@ struct cw1200_platform_data_sdio {
const char *sdd_file; /* if NULL, will use default for detected hw type */
};
const void *cw1200_get_platform_data(void);
/* An example of SPI support in your board setup file:
static struct cw1200_platform_data_spi cw1200_platform_data = {
.ref_clk = 38400,
.spi_bits_per_word = 16,
.reset = GPIO_RF_RESET,
.powerup = GPIO_RF_POWERUP,
.macaddr = wifi_mac_addr,
.sdd_file = "sdd_sagrad_1091_1098.bin",
};
static struct spi_board_info myboard_spi_devices[] __initdata = {
{
.modalias = "cw1200_wlan_spi",
.max_speed_hz = 52000000,
.bus_num = 0,
.irq = WIFI_IRQ,
.platform_data = &cw1200_platform_data,
.chip_select = 0,
},
};
*/
/* An example of SDIO support in your board setup file:
static struct cw1200_platform_data_sdio my_cw1200_platform_data = {
.ref_clk = 38400,
.have_5ghz = false,
.sdd_file = "sdd_myplatform.bin",
};
cw1200_sdio_set_platform_data(&my_cw1200_platform_data);
*/
void __init cw1200_sdio_set_platform_data(struct cw1200_platform_data_sdio *pdata);
#endif /* CW1200_PLAT_H_INCLUDED */