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Old 10-12-2010, 08:20 AM
Lee Jones
 
Default UBUNTU - ARM: igepv2: Fix handling of GPIOs for WLAN-BT combo

On 11/10/10 17:36, Mathieu Poirier wrote:
> SRU Justification:
>
> Impact: This patch is part of a series of fix for the IGEPv2 board.
> Initialization of the GPIOs used by the WLAN-BT must be tailored to the
> underlying HW.
>
> Fix: The fix entails checking the "hwrev" flag and make the proper
> configuration. This patch depends on [PATCH 3/6], applied to fix
> BugLink: https://bugs.launchpad.net/bugs/654586
>
> Testcase: Without this patch the WLAN BT combo simply won't work on
> newer boards.
>
>
>>From d469541061c47082a71525dcd2c005d3d5c17f61 Mon Sep 17 00:00:00 2001
> From: Enric Balletbo i Serra <eballetbo@gmail.com>
> Date: Mon, 11 Oct 2010 10:13:12 -0600
> Subject: [PATCH 4/6] UBUNTU - ARM: igepv2: Fix handling of GPIOs for WLAN-BT combo
>
> Some GPIO's used by WLAN-BT combo on IGEP v2 depends on hardware
> revision. This patch handles these GPIO's.
>
> ----------------------------------------------------------
> | Hw Rev. | WIFI_NPD | WIFI_NRESET | BT_NRESET |
> ----------------------------------------------------------
> | B | gpio94 | gpio95 | - |
> | B/C (B-compatible) | gpio94 | gpio95 | gpio137 |
> | C | gpio138 | gpio139 | gpio137 |
> ----------------------------------------------------------
>
> This work was tested by the community and also been submitted here:
> http://marc.info/?l=linux-omap&m=128628863419775&w=2
>
> BugLink: https://bugs.launchpad.net/bugs/654590
>
> Signed-off-by: Enric Balletbo i Serra <eballetbo@gmail.com>
> Signed-off-by: Mathieu J Poirier <mathieu.poirier@canonical.com>
> ---
> arch/arm/mach-omap2/board-igep0020.c | 98 ++++++++++++++++++++++++----------
> 1 files changed, 70 insertions(+), 28 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/board-igep0020.c b/arch/arm/mach-omap2/board-igep0020.c
> index 7715701..1047477 100644
> --- a/arch/arm/mach-omap2/board-igep0020.c
> +++ b/arch/arm/mach-omap2/board-igep0020.c
> @@ -38,22 +38,28 @@
> #define IGEP2_SMSC911X_CS 5
> #define IGEP2_SMSC911X_GPIO 176
> #define IGEP2_GPIO_USBH_NRESET 24
> -#define IGEP2_GPIO_LED0_GREEN 26
> -#define IGEP2_GPIO_LED0_RED 27
> -#define IGEP2_GPIO_LED1_RED 28
> -#define IGEP2_GPIO_DVI_PUP 170
> -#define IGEP2_GPIO_WIFI_NPD 94
> -#define IGEP2_GPIO_WIFI_NRESET 95
> +#define IGEP2_GPIO_LED0_GREEN 26
> +#define IGEP2_GPIO_LED0_RED 27
> +#define IGEP2_GPIO_LED1_RED 28
> +#define IGEP2_GPIO_DVI_PUP 170
> +
> +#define IGEP2_RB_GPIO_WIFI_NPD 94
> +#define IGEP2_RB_GPIO_WIFI_NRESET 95
> +#define IGEP2_RB_GPIO_BT_NRESET 137
> +#define IGEP2_RC_GPIO_WIFI_NPD 138
> +#define IGEP2_RC_GPIO_WIFI_NRESET 139
> +#define IGEP2_RC_GPIO_BT_NRESET 137
>
> /*
> * IGEP2 Hardware Revision Table
> *
> - * --------------------------
> - * | Id. | Hw Rev. | HW0 (28) |
> - * --------------------------
> - * | 0 | B/C | high |
> - * | 1 | C | low |
> - * --------------------------
> + * --------------------------------------------------------------------------
> + * | Id. | Hw Rev. | HW0 (28) | WIFI_NPD | WIFI_NRESET | BT_NRESET |
> + * --------------------------------------------------------------------------
> + * | 0 | B | high | gpio94 | gpio95 | - |
> + * | 0 | B/C (B-compatible) | high | gpio94 | gpio95 | gpio137 |
> + * | 1 | C | low | gpio138 | gpio139 | gpio137 |
> + * --------------------------------------------------------------------------
> */
>
> #define IGEP2_BOARD_HWREV_B 0
> @@ -295,12 +301,14 @@ static struct omap2_hsmmc_info mmc[] = {
> .gpio_cd = -EINVAL,
> .gpio_wp = -EINVAL,
> },
> +#if defined(CONFIG_LIBERTAS_SDIO) || defined(CONFIG_LIBERTAS_SDIO_MODULE)
> {
> .mmc = 2,
> .wires = 4,
> .gpio_cd = -EINVAL,
> .gpio_wp = -EINVAL,
> },
> +#endif
> {} /* Terminator */
> };
>
> @@ -577,6 +585,50 @@ static struct omap_board_mux board_mux[] __initdata = {
> #define board_mux NULL
> #endif
>
> +#if defined(CONFIG_LIBERTAS_SDIO) || defined(CONFIG_LIBERTAS_SDIO_MODULE)
> +
> +static void __init igep2_wlan_bt_init(void)
> +{
> + unsigned npd, wreset, btreset;
> +
> + /* GPIO's for WLAN-BT combo depends on hardware revision */
> + if (hwrev == IGEP2_BOARD_HWREV_B) {
> + npd = IGEP2_RB_GPIO_WIFI_NPD;
> + wreset = IGEP2_RB_GPIO_WIFI_NRESET;
> + btreset = IGEP2_RB_GPIO_BT_NRESET;
> + } else if (hwrev == IGEP2_BOARD_HWREV_C) {
> + npd = IGEP2_RC_GPIO_WIFI_NPD;
> + wreset = IGEP2_RC_GPIO_WIFI_NRESET;
> + btreset = IGEP2_RC_GPIO_BT_NRESET;
> + } else
> + return;
> +
> + /* Set GPIO's for WLAN-BT combo module */
> + if ((gpio_request(npd, "GPIO_WIFI_NPD") == 0) &&
> + (gpio_direction_output(npd, 1) == 0)) {
> + gpio_export(npd, 0);
> + } else
> + pr_warning("IGEP2: Could not obtain gpio GPIO_WIFI_NPD
");
> +
> + if ((gpio_request(wreset, "GPIO_WIFI_NRESET") == 0) &&
> + (gpio_direction_output(wreset, 1) == 0)) {
> + gpio_export(wreset, 0);
> + gpio_set_value(wreset, 0);
> + udelay(10);
> + gpio_set_value(wreset, 1);
> + } else
> + pr_warning("IGEP2: Could not obtain gpio GPIO_WIFI_NRESET
");
> +
> + if ((gpio_request(btreset, "GPIO_BT_NRESET") == 0) &&
> + (gpio_direction_output(btreset, 1) == 0)) {
> + gpio_export(btreset, 0);
> + } else
> + pr_warning("IGEP2: Could not obtain gpio GPIO_BT_NRESET
");
> +}
> +#else
> +static inline void __init igep2_wlan_bt_init(void) { }
> +#endif
> +
> static void __init igep2_init(void)
> {
> omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
> @@ -595,22 +647,12 @@ static void __init igep2_init(void)
> igep2_display_init();
> igep2_init_smsc911x();
>
> - /* GPIO W-LAN + Bluetooth combo module */
> - if ((gpio_request(IGEP2_GPIO_WIFI_NPD, "GPIO_WIFI_NPD") == 0) &&
> - (gpio_direction_output(IGEP2_GPIO_WIFI_NPD, 1) == 0)) {
> - gpio_export(IGEP2_GPIO_WIFI_NPD, 0);
> -/* gpio_set_value(IGEP2_GPIO_WIFI_NPD, 0); */
> - } else
> - pr_warning("IGEP v2: Could not obtain gpio GPIO_WIFI_NPD
");
> -
> - if ((gpio_request(IGEP2_GPIO_WIFI_NRESET, "GPIO_WIFI_NRESET") == 0) &&
> - (gpio_direction_output(IGEP2_GPIO_WIFI_NRESET, 1) == 0)) {
> - gpio_export(IGEP2_GPIO_WIFI_NRESET, 0);
> - gpio_set_value(IGEP2_GPIO_WIFI_NRESET, 0);
> - udelay(10);
> - gpio_set_value(IGEP2_GPIO_WIFI_NRESET, 1);
> - } else
> - pr_warning("IGEP v2: Could not obtain gpio GPIO_WIFI_NRESET
");
> + /*
> + * WLAN-BT combo module from MuRata wich has a Marvell WLAN
> + * (88W8686) + CSR Bluetooth chipset. Uses SDIO interface.
> + */
> + igep2_wlan_bt_init();
> +
> }
>
> static void __init igep2_map_io(void)

Signed-off-by: Lee Jones <lee.jones@canonical.com>

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