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Date: Fri, 22 Oct 2010 12:39:59 +0200
From: Par-Gunnar Hjalmdahl <par-gunnar.p.hjalmdahl@...ricsson.com>
To: linus.walleij@...ricsson.com, linux-bluetooth@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH 7/9] mach-ux500: Add support for the ST-Ericsson CG2900.
This patch adds board specific support for the ST-Ericsson CG2900
Connectivity Combo controller.
It contains device structures as well as necessary callback
functions.
Signed-off-by: Par-Gunnar Hjalmdahl <par-gunnar.p.hjalmdahl@...ricsson.com>
---
arch/arm/mach-ux500/Makefile | 1 +
arch/arm/mach-ux500/board-mop500.c | 3 +
arch/arm/mach-ux500/devices-cg2900.c | 261 ++++++++++++++++++++++++++++
arch/arm/mach-ux500/include/mach/devices.h | 4 +
4 files changed, 269 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-ux500/devices-cg2900.c
diff --git a/arch/arm/mach-ux500/Makefile b/arch/arm/mach-ux500/Makefile
index 9e27a84..7754aff 100644
--- a/arch/arm/mach-ux500/Makefile
+++ b/arch/arm/mach-ux500/Makefile
@@ -13,3 +13,4 @@ obj-$(CONFIG_LOCAL_TIMERS) += localtimer.o
obj-$(CONFIG_REGULATOR_AB8500) += board-mop500-regulators.o
obj-$(CONFIG_U5500_MODEM_IRQ) += modem_irq.o
obj-$(CONFIG_U5500_MBOX) += mbox.o
+obj-$(CONFIG_MFD_CG2900) += devices-cg2900.o
diff --git a/arch/arm/mach-ux500/board-mop500.c
b/arch/arm/mach-ux500/board-mop500.c
index 09fba17..589921b 100644
--- a/arch/arm/mach-ux500/board-mop500.c
+++ b/arch/arm/mach-ux500/board-mop500.c
@@ -303,6 +303,9 @@ static struct platform_device *platform_devs[]
__initdata = {
&ux500_i2c2_device,
&ux500_i2c3_device,
&ux500_ske_keypad_device,
+#ifdef CONFIG_MFD_CG2900
+ &ux500_cg2900_device,
+#endif
};
static void __init u8500_init_machine(void)
diff --git a/arch/arm/mach-ux500/devices-cg2900.c
b/arch/arm/mach-ux500/devices-cg2900.c
new file mode 100644
index 0000000..b5c60d5
--- /dev/null
+++ b/arch/arm/mach-ux500/devices-cg2900.c
@@ -0,0 +1,261 @@
+/*
+ * arch/arm/mach-ux500/devices-cg2900.c
+ *
+ * Copyright (C) ST-Ericsson SA 2010
+ * Authors:
+ * Par-Gunnar Hjalmdahl (par-gunnar.p.hjalmdahl@...ricsson.com) for
ST-Ericsson.
+ * Henrik Possung (henrik.possung@...ricsson.com) for ST-Ericsson.
+ * Josef Kindberg (josef.kindberg@...ricsson.com) for ST-Ericsson.
+ * Dariusz Szymszak (dariusz.xd.szymczak@...ricsson.com) for ST-Ericsson.
+ * Kjell Andersson (kjell.k.andersson@...ricsson.com) for ST-Ericsson.
+ * License terms: GNU General Public License (GPL), version 2
+ *
+ * Board specific device support for the Linux Bluetooth HCI H:4 Driver
+ * for ST-Ericsson connectivity controller.
+ */
+
+#include <asm/byteorder.h>
+#include <asm-generic/errno-base.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/skbuff.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/mfd/cg2900.h>
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci.h>
+#include <plat/pincfg.h>
+
+#include "pins-db8500.h"
+
+#ifdef CONFIG_MFD_CG2900
+
+#define BT_ENABLE_GPIO 170
+#define GBF_ENA_RESET_GPIO 171
+#define BT_CTS_GPIO 0
+
+#define GBF_ENA_RESET_NAME "gbf_ena_reset"
+#define BT_ENABLE_NAME "bt_enable"
+#define CG2900_NAME "cg2900_devices"
+
+#define UART_LINES_NUM 4
+
+#define BT_VS_POWER_SWITCH_OFF 0xFD40
+
+#define H4_HEADER_LENGTH 0x01
+#define BT_HEADER_LENGTH 0x03
+
+#define STLC2690_HCI_REV 0x0600
+#define CG2900_PG1_HCI_REV 0x0101
+#define CG2900_PG2_HCI_REV 0x0200
+#define CG2900_PG1_SPECIAL_HCI_REV 0x0700
+
+struct vs_power_sw_off_cmd {
+ __le16 op_code;
+ u8 len;
+ u8 gpio_0_7_pull_up;
+ u8 gpio_8_15_pull_up;
+ u8 gpio_16_20_pull_up;
+ u8 gpio_0_7_pull_down;
+ u8 gpio_8_15_pull_down;
+ u8 gpio_16_20_pull_down;
+} __attribute__((packed));
+
+static u16 cg2900_hci_revision;
+
+/* Pin configuration for UART functions. */
+static pin_cfg_t uart0_enabled[] = {
+ GPIO0_U0_CTSn | (PIN_DIR_INPUT | PIN_PULL_UP),
+ GPIO1_U0_RTSn | PIN_OUTPUT_HIGH,
+ GPIO2_U0_RXD | (PIN_DIR_INPUT | PIN_PULL_UP),
+ GPIO3_U0_TXD | PIN_OUTPUT_HIGH
+};
+
+/* Pin configuration for sleep mode. */
+static pin_cfg_t uart0_disabled[] = {
+ GPIO0_GPIO | (PIN_DIR_INPUT | PIN_PULL_UP), /* CTS pull up. */
+ GPIO1_GPIO | PIN_OUTPUT_HIGH, /* RTS high - flow off. */
+ GPIO2_GPIO | (PIN_DIR_INPUT | PIN_PULL_UP), /* RX pull down. */
+ GPIO3_GPIO | PIN_OUTPUT_LOW /* TX low - break on. */
+};
+
+static void cg2900_enable_chip(void)
+{
+ gpio_set_value(GBF_ENA_RESET_GPIO, 1);
+}
+
+static void cg2900_disable_chip(void)
+{
+ gpio_set_value(GBF_ENA_RESET_GPIO, 0);
+}
+
+static void cg2900_set_hci_revision(u8 hci_version, u16 hci_revision,
+ u8 lmp_version, u8 lmp_subversion,
+ u16 manufacturer)
+{
+ cg2900_hci_revision = hci_revision;
+ /* We don't care about the other values */
+}
+
+static struct sk_buff *cg2900_get_power_switch_off_cmd(u16 *op_code)
+{
+ struct sk_buff *skb;
+ struct vs_power_sw_off_cmd *cmd;
+
+ /* If connected chip does not support the command return NULL */
+ if (CG2900_PG1_SPECIAL_HCI_REV != cg2900_hci_revision &&
+ CG2900_PG1_HCI_REV != cg2900_hci_revision &&
+ CG2900_PG2_HCI_REV != cg2900_hci_revision)
+ return NULL;
+
+ skb = alloc_skb(sizeof(*cmd) + H4_HEADER_LENGTH, GFP_KERNEL);
+ if (!skb) {
+ pr_err(CG2900_NAME "Could not allocate skb");
+ return NULL;
+ }
+
+ skb_reserve(skb, H4_HEADER_LENGTH);
+ cmd = (struct vs_power_sw_off_cmd *)skb_put(skb, sizeof(*cmd));
+ cmd->op_code = cpu_to_le16(BT_VS_POWER_SWITCH_OFF);
+ cmd->len = sizeof(*cmd) - BT_HEADER_LENGTH;
+ /*
+ * Enter system specific GPIO settings here:
+ * Section data[3-5] is GPIO pull-up selection
+ * Section data[6-8] is GPIO pull-down selection
+ * Each section is a bitfield where
+ * - byte 0 bit 0 is GPIO 0
+ * - byte 0 bit 1 is GPIO 1
+ * - up to
+ * - byte 2 bit 4 which is GPIO 20
+ * where each bit means:
+ * - 0: No pull-up / no pull-down
+ * - 1: Pull-up / pull-down
+ * All GPIOs are set as input.
+ */
+ cmd->gpio_0_7_pull_up = 0x00;
+ cmd->gpio_8_15_pull_up = 0x00;
+ cmd->gpio_16_20_pull_up = 0x00;
+ cmd->gpio_0_7_pull_down = 0x00;
+ cmd->gpio_8_15_pull_down = 0x00;
+ cmd->gpio_16_20_pull_down = 0x00;
+
+ if (op_code)
+ *op_code = BT_VS_POWER_SWITCH_OFF;
+
+ return skb;
+}
+static int cg2900_init(void)
+{
+ int err = 0;
+
+ err = gpio_request(GBF_ENA_RESET_GPIO, GBF_ENA_RESET_NAME);
+ if (err < 0) {
+ pr_err(CG2900_NAME "gpio_request failed with err: %d", err);
+ goto finished;
+ }
+
+ err = gpio_direction_output(GBF_ENA_RESET_GPIO, 1);
+ if (err < 0) {
+ pr_err(CG2900_NAME "gpio_direction_output failed with err: %d",
+ err);
+ goto error_handling;
+ }
+
+ err = gpio_request(BT_ENABLE_GPIO, BT_ENABLE_NAME);
+ if (err < 0) {
+ pr_err(CG2900_NAME "gpio_request failed with err: %d", err);
+ goto finished;
+ }
+
+ err = gpio_direction_output(BT_ENABLE_GPIO, 1);
+ if (err < 0) {
+ pr_err(CG2900_NAME "gpio_direction_output failed with err: %d",
+ err);
+ goto error_handling;
+ }
+
+ goto finished;
+
+error_handling:
+ gpio_free(GBF_ENA_RESET_GPIO);
+
+finished:
+ cg2900_disable_chip();
+ return err;
+}
+
+void cg2900_exit(void)
+{
+ cg2900_disable_chip();
+ gpio_free(GBF_ENA_RESET_GPIO);
+}
+
+#ifdef CONFIG_MFD_CG2900_UART
+
+static int cg2900_disable_uart(void)
+{
+ int err;
+
+ /*
+ * Without this delay we get interrupt on CTS immediately
+ * due to some turbulences on this line.
+ */
+ mdelay(4);
+
+ /* Disable UART functions. */
+ err = nmk_config_pins(uart0_disabled, UART_LINES_NUM);
+ if (err)
+ goto error;
+
+ return 0;
+
+error:
+ (void)nmk_config_pins(uart0_enabled, UART_LINES_NUM);
+ pr_err(CG2900_NAME "Cannot set interrupt (%d)", err);
+ return err;
+}
+
+
+static int cg2900_enable_uart(void)
+{
+ int err;
+
+ /* Restore UART settings. */
+ err = nmk_config_pins(uart0_enabled, UART_LINES_NUM);
+ if (err)
+ pr_err(CG2900_NAME "Unable to enable UART (%d)", err);
+
+ return err;
+}
+
+#endif /* CONFIG_MFD_CG2900_UART */
+
+struct cg2900_platform_data cg2900_platform_data = {
+ .init = cg2900_init,
+ .exit = cg2900_exit,
+ .enable_chip = cg2900_enable_chip,
+ .disable_chip = cg2900_disable_chip,
+ .set_hci_revision = cg2900_set_hci_revision,
+ .get_power_switch_off_cmd = cg2900_get_power_switch_off_cmd,
+
+ .bus = HCI_UART,
+
+#ifdef CONFIG_MFD_CG2900_UART
+ .uart = {
+ .cts_irq = NOMADIK_GPIO_TO_IRQ(BT_CTS_GPIO),
+ .enable_uart = cg2900_enable_uart,
+ .disable_uart = cg2900_disable_uart
+ },
+#endif /* CONFIG_MFD_CG2900_UART */
+};
+
+struct platform_device ux500_cg2900_device = {
+ .name = "cg2900",
+ .dev = {
+ .platform_data = &cg2900_platform_data,
+ }
+};
+#endif /* CONFIG_MFD_CG2900 */
diff --git a/arch/arm/mach-ux500/include/mach/devices.h
b/arch/arm/mach-ux500/include/mach/devices.h
index b91a4d1..cbc7897 100644
--- a/arch/arm/mach-ux500/include/mach/devices.h
+++ b/arch/arm/mach-ux500/include/mach/devices.h
@@ -28,6 +28,10 @@ extern struct platform_device u8500_i2c4_device;
extern struct platform_device u8500_dma40_device;
extern struct platform_device ux500_ske_keypad_device;
+#ifdef CONFIG_MFD_CG2900
+extern struct platform_device ux500_cg2900_device;
+#endif
+
extern struct amba_device u8500_sdi0_device;
extern struct amba_device u8500_sdi1_device;
extern struct amba_device u8500_sdi2_device;
--
1.6.3.3
--
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