fuze+: implement Synaptics RMI driver on top of i2c, add touchpad debug screen, bootloader enters debug screen by default

Since the bootloader currently always fails at storage point (unimplemented), always enter touchpad debug screen and power off which pressing power button.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29859 a1c6a512-1295-4272-9138-f99709370657

firmware/target/arm/imx233/sansa-fuzeplus/button-fuzeplus.c

@@ -22,9 +22,143 @@
 #include "system.h"
 #include "system-target.h"
 #include "pinctrl-imx233.h"
+#include "generic_i2c.h"
+#include "synaptics-rmi.h"
+#include "lcd.h"
+
+static void i2c_scl_dir(bool out)
+{
+    imx233_enable_gpio_output(0, 30, out);
+}
+
+static void i2c_sda_dir(bool out)
+{
+    imx233_enable_gpio_output(0, 31, out);
+}
+
+static void i2c_scl_out(bool high)
+{
+    imx233_set_gpio_output(0, 30, high);
+}
+
+static void i2c_sda_out(bool high)
+{
+    imx233_set_gpio_output(0, 31, high);
+}
+
+static bool i2c_scl_in(void)
+{
+    return imx233_get_gpio_input_mask(0, 1 << 30);
+}
+
+static bool i2c_sda_in(void)
+{
+    return imx233_get_gpio_input_mask(0, 1 << 31);
+}
+
+static void i2c_delay(int d)
+{
+    udelay(d);
+}
+
+struct i2c_interface btn_i2c =
+{
+    .scl_dir = i2c_scl_dir,
+    .sda_dir = i2c_sda_dir,
+    .scl_out = i2c_scl_out,
+    .sda_out = i2c_sda_out,
+    .scl_in = i2c_scl_in,
+    .sda_in = i2c_sda_in,
+    .delay = i2c_delay,
+    .delay_hd_sta = 4,
+    .delay_hd_dat = 5,
+    .delay_su_dat = 1,
+    .delay_su_sto = 4,
+    .delay_su_sta = 5,
+    .delay_thigh = 4
+};
+
+int rmi_i2c_bus = -1;
+
+void button_debug_screen(void)
+{
+    char product_id[RMI_PRODUCT_ID_LEN];
+    rmi_read(RMI_PRODUCT_ID, RMI_PRODUCT_ID_LEN, product_id);
+
+    while(1)
+    {
+        lcd_clear_display();
+        int btns = button_read_device();
+        lcd_putsf(0, 0, "button bitmap: %x", btns);
+        lcd_putsf(0, 1, "RMI: product=%s", product_id);
+        lcd_putsf(0, 2, "touchpad presence: %x", rmi_read_single(RMI_FUNCTION_PRESENCE(RMI_2D_TOUCHPAD_FUNCTION)));
+        lcd_putsf(0, 3, "sensor prop: %x", rmi_read_single(RMI_2D_SENSOR_PROP2(0)));
+        int x_max = rmi_read_single(RMI_2D_SENSOR_XMAX_MSB(0)) << 8 | rmi_read_single(RMI_2D_SENSOR_XMAX_LSB(0));
+        int y_max = rmi_read_single(RMI_2D_SENSOR_YMAX_MSB(0)) << 8 | rmi_read_single(RMI_2D_SENSOR_YMAX_LSB(0));
+        lcd_putsf(0, 4, "xmax=%d ymax=%d res=%d", x_max, y_max,
+            rmi_read_single(RMI_2D_SENSOR_RESOLUTION(0)));
+        lcd_putsf(0, 5, "din0=%x", imx233_get_gpio_input_mask(0, 0x08000000));
+        lcd_putsf(0, 6, "dev ctl: %x", rmi_read_single(RMI_DEVICE_CONTROL));
+        lcd_putsf(0, 7, "int en: %x", rmi_read_single(RMI_INTERRUPT_ENABLE));
+        lcd_putsf(0, 8, "int req: %x", rmi_read_single(RMI_INTERRUPT_REQUEST));
+        union
+        {
+            unsigned char data[10];
+            struct
+            {
+                unsigned char absolute_misc;
+                unsigned char absolute_z;
+                unsigned char absolute_x_msb;
+                unsigned char absolute_x_lsb;
+                unsigned char absolute_y_msb;
+                unsigned char absolute_y_lsb;
+                signed char relative_x;  /* signed */
+                signed char relative_y; /* signed */
+                unsigned char gesture_misc;
+                unsigned char gesture_flick;
+            } __attribute__((packed)) s;
+        }u;
+        int absolute_x = u.s.absolute_x_msb << 8 | u.s.absolute_x_lsb;
+        int absolute_y = u.s.absolute_y_msb << 8 | u.s.absolute_y_lsb;
+        rmi_read(RMI_DATA_REGISTER(0), 10, u.data);
+        lcd_putsf(0, 9, "abs: %d %d", absolute_x, absolute_y);
+        lcd_putsf(0, 10, "rel: %d %d", (int)u.s.relative_x, (int)u.s.relative_y);
+        lcd_putsf(0, 11, "gesture: %x %x", u.s.gesture_misc, u.s.gesture_flick);
+        
+        lcd_update();
+        
+        if(btns & BUTTON_POWER)
+            break;
+        yield();
+    }
+}
 
 void button_init_device(void)
 {
+    rmi_i2c_bus = i2c_add_node(&btn_i2c);
+    rmi_init(rmi_i2c_bus, 0x40);
+
+    /* Synaptics TouchPad information:
+     * - product id: 1533
+     * - nr function: 1 (0x10 = 2D touchpad)
+     * 2D Touchpad information (function 0x10)
+     * - nr data sources: 3
+     * - standard layout
+     * - extra data registers: 7
+     * - nr sensors: 1
+     * 2D Touchpad Sensor #0 information:
+     * - has relative data: yes
+     * - has palm detect: yes
+     * - has multi finger: yes
+     * - has enhanced gesture: yes
+     * - has scroller: no
+     * - has 2D scrollers: no
+     * - Maximum X: 3009
+     * - Maxumum Y: 1974
+     * - Resolution: 82
+     *
+     * ATTENTION line: B0P27 asserted low
+     */
 }
 
 int button_read_device(void)

firmware/target/arm/imx233/sansa-fuzeplus/button-target.h

@@ -26,6 +26,7 @@
 
 void button_init_device(void);
 int button_read_device(void);
+void button_debug_screen(void);
 
 /* Main unit's buttons */
 #define BUTTON_POWER        0x00000001