ARM: S3C64XX: Use module identification for Cragganmore system builds

The Cragganmore system is modular with I2C based identification chips on
the system allowing identification of the system build. Provide a stub I2C
driver which parses the module IDs and uses them to select the appropriate
audio subsystem components to register. To avoid confusion due to having
the mini-driver in the system the driver is placed in a separate file.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

1 files changed, 173 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c64xx/mach-crag6410-module.c b/arch/arm/mach-s3c64xx/mach-crag6410-module.c
new file mode 100644
index 000000000000..0708fa01db9c
--- /dev/null
+++ b/arch/arm/mach-s3c64xx/mach-crag6410-module.c
@@ -0,0 +1,173 @@
+/* Speyside modules for Cragganmore - board data probing
+ *
+ * Copyright 2011 Wolfson Microelectronics plc
+ *      Mark Brown <broonie@opensource.wolfsonmicro.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/interrupt.h>
+#include <linux/i2c.h>
+
+#include <linux/mfd/wm831x/irq.h>
+#include <linux/mfd/wm831x/gpio.h>
+
+#include <sound/wm8996.h>
+#include <sound/wm8962.h>
+#include <sound/wm9081.h>
+
+#include <mach/crag6410.h>
+
+static struct wm8996_retune_mobile_config wm8996_retune[] = {
+        {
+                .name = "Sub LPF",
+                .rate = 48000,
+                .regs = {
+                        0x6318, 0x6300, 0x1000, 0x0000, 0x0004, 0x2000, 0xF000,
+                        0x0000, 0x0004, 0x2000, 0xF000, 0x0000, 0x0004, 0x2000,
+                        0xF000, 0x0000, 0x0004, 0x1000, 0x0800, 0x4000
+                },
+        },
+        {
+                .name = "Sub HPF",
+                .rate = 48000,
+                .regs = {
+                        0x000A, 0x6300, 0x1000, 0x0000, 0x0004, 0x2000, 0xF000,
+                        0x0000, 0x0004, 0x2000, 0xF000, 0x0000, 0x0004, 0x2000,
+                        0xF000, 0x0000, 0x0004, 0x1000, 0x0800, 0x4000
+                },
+        },
+};
+
+static struct wm8996_pdata wm8996_pdata __initdata = {
+        .ldo_ena = S3C64XX_GPN(7),
+        .gpio_base = CODEC_GPIO_BASE,
+        .micdet_def = 1,
+        .inl_mode = WM8996_DIFFERRENTIAL_1,
+        .inr_mode = WM8996_DIFFERRENTIAL_1,
+
+        .irq_flags = IRQF_TRIGGER_RISING,
+
+        .gpio_default = {
+                0x8001, /* GPIO1 == ADCLRCLK1 */
+                0x8001, /* GPIO2 == ADCLRCLK2, input due to CPU */
+                0x0141, /* GPIO3 == HP_SEL */
+                0x0002, /* GPIO4 == IRQ */
+                0x020e, /* GPIO5 == CLKOUT */
+        },
+
+        .retune_mobile_cfgs = wm8996_retune,
+        .num_retune_mobile_cfgs = ARRAY_SIZE(wm8996_retune),
+};
+
+static struct wm8962_pdata wm8962_pdata __initdata = {
+        .gpio_init = {
+                0,
+                WM8962_GPIO_FN_OPCLK,
+                WM8962_GPIO_FN_DMICCLK,
+                0,
+                0x8000 | WM8962_GPIO_FN_DMICDAT,
+                WM8962_GPIO_FN_IRQ,    /* Open drain mode */
+        },
+        .irq_active_low = true,
+};
+
+static struct wm9081_pdata wm9081_pdata __initdata = {
+        .irq_high = false,
+        .irq_cmos = false,
+};
+
+static const struct i2c_board_info wm1254_devs[] = {
+        { I2C_BOARD_INFO("wm8996", 0x1a),
+          .platform_data = &wm8996_pdata,
+          .irq = GLENFARCLAS_PMIC_IRQ_BASE + WM831X_IRQ_GPIO_2,
+        },
+        { I2C_BOARD_INFO("wm9081", 0x6c),
+          .platform_data = &wm9081_pdata, },
+};
+
+static const struct i2c_board_info wm1259_devs[] = {
+        { I2C_BOARD_INFO("wm8962", 0x1a),
+          .platform_data = &wm8962_pdata,
+          .irq = GLENFARCLAS_PMIC_IRQ_BASE + WM831X_IRQ_GPIO_2,
+        },
+};
+
+
+static __devinitdata const struct {
+        u8 id;
+        const char *name;
+        const struct i2c_board_info *i2c_devs;
+        int num_i2c_devs;
+} gf_mods[] = {
+        { .id = 0x01, .name = "1250-EV1 Springbank" },
+        { .id = 0x02, .name = "1251-EV1 Jura" },
+        { .id = 0x03, .name = "1252-EV1 Glenlivet" },
+        { .id = 0x11, .name = "6249-EV2 Glenfarclas", },
+        { .id = 0x21, .name = "1275-EV1 Mortlach" },
+        { .id = 0x25, .name = "1274-EV1 Glencadam" },
+        { .id = 0x31, .name = "1253-EV1 Tomatin", },
+        { .id = 0x39, .name = "1254-EV1 Dallas Dhu",
+          .i2c_devs = wm1254_devs, .num_i2c_devs = ARRAY_SIZE(wm1254_devs) },
+        { .id = 0x3a, .name = "1259-EV1 Tobermory",
+          .i2c_devs = wm1259_devs, .num_i2c_devs = ARRAY_SIZE(wm1259_devs) },
+        { .id = 0x3b, .name = "1255-EV1 Kilchoman" },
+        { .id = 0x3c, .name = "1273-EV1 Longmorn" },
+};
+
+static __devinit int wlf_gf_module_probe(struct i2c_client *i2c,
+                                         const struct i2c_device_id *i2c_id)
+{
+        int ret, i, j, id, rev;
+
+        ret = i2c_smbus_read_byte_data(i2c, 0);
+        if (ret < 0) {
+                dev_err(&i2c->dev, "Failed to read ID: %d\n", ret);
+                return ret;
+        }
+
+        id = (ret & 0xfe) >> 2;
+        rev = ret & 0x3;
+        for (i = 0; i < ARRAY_SIZE(gf_mods); i++)
+                if (id == gf_mods[i].id)
+                        break;
+
+        if (i < ARRAY_SIZE(gf_mods)) {
+                dev_info(&i2c->dev, "%s revision %d\n",
+                         gf_mods[i].name, rev + 1);
+                for (j = 0; j < gf_mods[i].num_i2c_devs; j++) {
+                        if (!i2c_new_device(i2c->adapter,
+                                            &(gf_mods[i].i2c_devs[j])))
+                                dev_err(&i2c->dev,
+                                        "Failed to register dev: %d\n", ret);
+                }
+        } else {
+                dev_warn(&i2c->dev, "Unknown module ID %d revision %d\n",
+                         id, rev);
+        }
+
+        return 0;
+}
+
+static const struct i2c_device_id wlf_gf_module_id[] = {
+        { "wlf-gf-module", 0 },
+        { }
+};
+
+static struct i2c_driver wlf_gf_module_driver = {
+        .driver = {
+                .name = "wlf-gf-module",
+                .owner = THIS_MODULE,
+        },
+        .probe = wlf_gf_module_probe,
+        .id_table = wlf_gf_module_id,
+};
+
+static int __init wlf_gf_module_register(void)
+{
+        return i2c_add_driver(&wlf_gf_module_driver);
+}
+module_init(wlf_gf_module_register);