Move the Synaptics touchpad driver for the m:robe 100 to a common place. It will (soon) be used for the Philips HDD1630.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19465 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 18 insertions, 477 deletions

diff --git a/firmware/target/arm/olympus/mrobe-100/button-mr100.c b/firmware/target/arm/olympus/mrobe-100/button-mr100.c
index e8fc8b97ea..9cfd8affa9 100644
--- a/firmware/target/arm/olympus/mrobe-100/button-mr100.c
+++ b/firmware/target/arm/olympus/mrobe-100/button-mr100.c
@@ -19,480 +19,24 @@
  *
  ****************************************************************************/
 
-#include <stdlib.h>
-#include "config.h"
-#include "cpu.h"
 #include "system.h"
 #include "button.h"
-#include "kernel.h"
 #include "backlight.h"
 #include "backlight-target.h"
-#include "system.h"
+#include "synaptics-mep.h"
 
 #define LOGF_ENABLE
 #include "logf.h"
 
+#define MEP_BUTTON_HEADER   0x1a
+#define MEP_BUTTON_ID       0x9
+#define MEP_ABSOLUTE_HEADER 0x0b
+
 static int int_btn = BUTTON_NONE;
 
 #ifndef BOOTLOADER
-/* Driver for the Synaptics Touchpad based on the "Synaptics Modular Embedded
-   Protocol: 3-Wire Interface Specification" documentation */
-
-#define ACK     (GPIOD_INPUT_VAL & 0x1)
-#define ACK_HI  GPIOD_OUTPUT_VAL |=  0x1
-#define ACK_LO  GPIOD_OUTPUT_VAL &= ~0x1
-
-#define CLK     ((GPIOD_INPUT_VAL & 0x2) >> 1)
-#define CLK_HI  GPIOD_OUTPUT_VAL |=  0x2
-#define CLK_LO  GPIOD_OUTPUT_VAL &= ~0x2
-
-#define DATA    ((GPIOD_INPUT_VAL & 0x4) >> 2)
-#define DATA_HI GPIOD_OUTPUT_EN |= 0x4; GPIOD_OUTPUT_VAL |=  0x4
-#define DATA_LO GPIOD_OUTPUT_EN |= 0x4; GPIOD_OUTPUT_VAL &= ~0x4
-
-#define LO 0
-#define HI 1
-
-#define STATUS_READY    1
-#define READ_RETRY      8
-#define READ_ERROR     -1
-
-#define HELLO_HEADER    0x19
-#define HELLO_ID        0x1
-#define BUTTONS_HEADER  0x1a
-#define BUTTONS_ID      0x9
-#define ABSOLUTE_HEADER 0x0b
-
-#define MEP_READ 0x1
-#define MEP_WRITE 0x3
-
 static int syn_status = 0;
 
-static int syn_wait_clk_change(unsigned int val)
-{
-    int i;
-
-    for (i = 0; i < 10000; i++)
-    {
-        if (CLK == val)
-            return 1;
-    }
-
-    return 0;
-}
-
-static inline int syn_get_data(void)
-{
-    GPIOD_OUTPUT_EN &= ~0x4;
-    return DATA;
-}
-
-static void syn_wait_guest_flush(void)
-{
-    /* Flush receiving (flushee) state:
-       handshake until DATA goes high during P3 stage */
-    if (CLK == LO)
-    {
-        ACK_HI;                  /* P1 -> P2 */
-        syn_wait_clk_change(HI); /* P2 -> P3 */
-    }
-
-    while (syn_get_data() == LO)
-    {
-        ACK_HI;                  /* P3 -> P0 */
-        syn_wait_clk_change(LO); /* P0 -> P1 */
-        ACK_LO;                  /* P1 -> P2 */
-        syn_wait_clk_change(HI); /* P2 -> P3 */
-    }
-
-    /* Continue handshaking until back to P0 */
-    ACK_HI;                      /* P3 -> P0 */
-}
-
-static void syn_flush(void)
-{
-    int i;
-#if defined(LOGF_ENABLE)
-    logf("syn_flush...");
-#endif
-    /* Flusher holds DATA low for at least 36 handshake cycles */
-    DATA_LO;
-
-    for (i = 0; i < 36; i++)
-    {
-        syn_wait_clk_change(LO); /* P0 -> P1 */
-        ACK_LO;                  /* P1 -> P2 */
-        syn_wait_clk_change(HI); /* P2 -> P3 */
-        ACK_HI;                  /* P3 -> P0 */
-    }
-
-    /* Raise DATA in P1 stage */
-    syn_wait_clk_change(LO); /* P0 -> P1 */
-    DATA_HI;
-
-    /* After a flush, the flushing device enters a flush-receiving (flushee)
-       state */
-    syn_wait_guest_flush();
-}
-
-static int syn_send_data(int *data, int len)
-{
-    int i, bit;
-    int parity = 0;
-#if defined(LOGF_ENABLE)
-    logf("syn_send_data...");
-#endif
-    /* 1. Lower DATA line to issue a request-to-send to guest */
-    DATA_LO;
-
-    /* 2. Wait for guest to lower CLK */
-    syn_wait_clk_change(LO);
-
-    /* 3. Lower ACK (with DATA still low) */
-    ACK_LO;
-
-    /* 4. Wait for guest to raise CLK */
-    syn_wait_clk_change(HI);
-
-    /* 5. Send data */
-    for (i = 0; i < len; i++)
-    {
-#if defined(LOGF_ENABLE)
-       logf("  sending byte: %d", data[i]);
-#endif
-        bit = 0;
-        while (bit < 8)
-        {
-            /* 5a. Drive data low if bit is 0, or high if bit is 1 */
-            if (data[i] & (1 << bit))
-            {
-                DATA_HI;
-                parity++;
-            }
-            else
-            {
-                DATA_LO;
-            }
-            bit++;
-
-            /* 5b. Invert ACK to indicate that the data bit is ready */
-            ACK_HI;
-
-            /* 5c. Wait for guest to invert CLK */
-            syn_wait_clk_change(LO);
-
-            /* Repeat for next bit */
-            if (data[i] & (1 << bit))
-            {
-                DATA_HI;
-                parity++;
-            }
-            else
-            {
-                DATA_LO;
-            }
-            bit++;
-
-            ACK_LO;
-
-            syn_wait_clk_change(HI);
-        }
-    }
-
-    /* 7. Transmission termination sequence: */
-    /* 7a. Host may put parity bit on DATA. Hosts that do not generate
-           parity should set DATA high. Parity is 1 if there's an odd
-           number of '1' bits, or 0 if there's an even number of '1' bits. */
-    parity = parity % 2;
-#if defined(LOGF_ENABLE)    
-    logf("  send parity = %d", parity);
-#endif   
-    if (parity)
-    {
-        DATA_HI;
-    }
-    else
-    {
-        DATA_LO;
-    }
-
-    /* 7b. Raise ACK to indicate that the optional parity bit is ready */
-    ACK_HI;
-
-    /* 7c. Guest lowers CLK */
-    syn_wait_clk_change(LO);
-
-    /* 7d. Pull DATA high (if parity bit was 0) */
-    DATA_HI;
-
-    /* 7e. Lower ACK to indicate that the stop bit is ready */
-    ACK_LO;
-
-    /* 7f. Guest raises CLK */
-    syn_wait_clk_change(HI);
-
-    /* 7g. If DATA is low, guest is flushing this transfer. Host should
-           enter the flushee state. */
-    if (syn_get_data() == LO)
-    {
-#if defined(LOGF_ENABLE)
-        logf("  module flushing");
-#endif     
-        syn_wait_guest_flush();
-        return -1;
-    }
-
-    /* 7h. Host raises ACK and the link enters the idle state */
-    ACK_HI;
-
-    return len;
-}
-
-static int syn_read_data(int *data, int data_len)
-{
-    int i, len, bit, parity, tmp;
-    int *data_ptr;
-#if defined(LOGF_ENABLE)
-    logf("syn_read_data...");
-#endif
-    /* 1. Guest drives CLK low */
-    if (CLK != LO)
-        return 0;
-
-    /* 1a. If the host is willing to receive a packet it lowers ACK */
-    ACK_LO;
-
-    /* 2. Guest may issue a request-to-send by lowering DATA. If the
-          guest decides not to transmit a packet, it may abort the
-          transmission by not lowering DATA. */
-
-    /* 3. The guest raises CLK */
-    syn_wait_clk_change(HI);
-
-    /* 4. If the guest is still driving DATA low, the transfer is commited
-          to occur. Otherwise, the transfer is aborted. In either case, 
-          the host raises ACK. */
-    if (syn_get_data() == HI)
-    {
-        logf("  read abort");
-
-        ACK_HI;
-        return READ_ERROR;
-    }
-    else
-    {
-        ACK_HI;
-    }
-
-    /* 5. Read the incoming data packet */
-    i = 0;
-    len = 0;
-    parity = 0;
-    while (i <= len)
-    {
-        bit = 0;
-
-        if (i < data_len)
-            data_ptr = &data[i];
-        else
-            data_ptr = &tmp;
-
-        *data_ptr = 0;
-        while (bit < 8)
-        {
-            /* 5b. Guset inverts CLK to indicate that data is ready */
-            syn_wait_clk_change(LO);
-
-            /* 5d. Read the data bit from DATA */
-            if (syn_get_data() == HI)
-            {
-                *data_ptr |= (1 << bit);
-                parity++;
-            }
-            bit++;
-
-            /* 5e. Invert ACK to indicate that data has been read */
-            ACK_LO;
-
-            /* Repeat for next bit */
-            syn_wait_clk_change(HI);
-
-            if (syn_get_data() == HI)
-            {
-                *data_ptr |= (1 << bit);
-                parity++;
-            }
-            bit++;
-
-            ACK_HI;
-        }
-
-        /* First byte is the packet header */
-        if (i == 0)
-        {
-            /* Format control (bit 3) should be 1 */
-            if (*data_ptr & 0x8)
-            {
-                /* Packet length is bits 0:2 */
-                len = *data_ptr & 0x7;
-#if defined(LOGF_ENABLE)
-                logf("  packet length = %d", len);
-#endif
-            }
-            else
-            {
-                logf("  invalid format ctrl bit");
-                return READ_ERROR;
-            }
-        }
-
-        i++;
-    }
-
-    /* 7. Transmission termination cycle */
-    /* 7a. The guest generates a parity bit on DATA */
-    /* 7b. The host waits for guest to lower CLK */
-    syn_wait_clk_change(LO);
-
-    /* 7c. The host verifies the parity bit is correct */
-    parity = parity % 2;
-#if defined(LOGF_ENABLE)
-    logf("  parity check: %d / %d", syn_get_data(), parity);
-#endif
-    /* TODO: parity error handling */
-
-    /* 7d. The host lowers ACK */
-    ACK_LO;
-
-    /* 7e. The host waits for the guest to raise CLK indicating 
-           that the stop bit is ready */
-    syn_wait_clk_change(HI);
-
-    /* 7f. The host reads DATA and verifies that it is 1 */
-    if (syn_get_data() == LO)
-    {
-        logf("  framing error");
-
-        ACK_HI;
-        return READ_ERROR;
-    }
-
-    ACK_HI;
-
-    return len;
-}
-
-static int syn_read_device(int *data, int len)
-{
-    int i;
-    int ret = READ_ERROR;
-
-    for (i = 0; i < READ_RETRY; i++)
-    {
-        if (syn_wait_clk_change(LO))
-        {
-            /* module is sending data */
-            ret = syn_read_data(data, len);
-            if (ret != READ_ERROR)
-                return ret;
-
-            syn_flush();
-        }
-        else
-        {
-            /* module is idle */
-            return 0;
-        }
-    }
-
-    return ret;
-}
-
-static int syn_reset(void)
-{
-    int val, id;
-    int data[2];
-#if defined(LOGF_ENABLE)
-    logf("syn_reset...");
-#endif
-    /* reset module 0 */
-    val = (0 << 4) | (1 << 3) | 0;
-    syn_send_data(&val, 1);
-
-    val = syn_read_device(data, 2);
-    if (val == 1)
-    {
-        val = data[0] & 0xff;      /* packet header */
-        id = (data[1] >> 4) & 0xf; /* packet id */
-        if ((val == HELLO_HEADER) && (id == HELLO_ID))
-        {
-            logf("  module 0 reset");
-            return 1;
-        }
-    }
-
-    logf("  reset failed");
-    return 0;
-}
-
-#if defined(ROCKBOX_HAS_LOGF) && defined(LOGF_ENABLE)
-static void syn_info(void)
-{
-    int i, val;
-    int data[8];
-
-    logf("syn_info...");
-
-    /* module base info */
-    logf("module base info:");
-    data[0] = MEP_READ;
-    data[1] = 0x80;
-    syn_send_data(data, 2);
-    val = syn_read_device(data, 8);
-    if (val > 0)
-    {
-        for (i = 0; i < 8; i++)
-            logf("  data[%d] = 0x%02x", i, data[i]);
-    }
-    
-    /* module product info */
-    logf("module product info:");
-    data[0] = MEP_READ;
-    data[1] = 0x81;
-    syn_send_data(data, 2);
-    val = syn_read_device(data, 8);
-    if (val > 0)
-    {
-        for (i = 0; i < 8; i++)
-            logf("  data[%d] = 0x%02x", i, data[i]);
-    }
-
-    /* module serialization */
-    logf("module serialization:");
-    data[0] = MEP_READ;
-    data[1] = 0x82;
-    syn_send_data(data, 2);
-    val = syn_read_device(data, 8);
-    if (val > 0)
-    {
-        for (i = 0; i < 8; i++)
-            logf("  data[%d] = 0x%02x", i, data[i]);
-    }
-
-    /* 1-D sensor info */
-    logf("1-d sensor info:");
-    data[0] = MEP_READ;
-    data[1] = 0x80 + 0x20;
-    syn_send_data(data, 2);
-    val = syn_read_device(data, 8);
-    if (val > 0)
-    {
-        for (i = 0; i < 8; i++)
-            logf("  data[%d] = 0x%02x", i, data[i]);
-    }
-}
-#endif
-
 void button_init_device(void)
 {
     /* enable touchpad leds */
@@ -514,15 +58,13 @@ void button_init_device(void)
     GPIOD_OUTPUT_EN  |=  0x4; /* DATA */
     GPIOD_OUTPUT_VAL |=  0x4; /* high */
 
-    syn_flush();
-
-    if (syn_reset())
+    if (syn_init())
     {
-#if defined(ROCKBOX_HAS_LOGF) && defined(LOGF_ENABLE)
+#ifdef ROCKBOX_HAS_LOGF
         syn_info();
 #endif
 
-        syn_status = STATUS_READY;
+        syn_status = 1;
 
         /* enable interrupts */
         GPIOD_INT_LEV &= ~0x2;
@@ -544,24 +86,25 @@ void button_int(void)
 
     int_btn = BUTTON_NONE;
 
-    if (syn_status == STATUS_READY)
+    if (syn_status)
     {
         /* disable interrupt while we read the touchpad */
-        GPIOD_INT_EN &= ~0x2;
+        GPIOD_INT_EN  &= ~0x2;
+        GPIOD_INT_CLR |=  0x2;
 
         val = syn_read_device(data, 4);
         if (val > 0)
         {
             val = data[0] & 0xff;      /* packet header */
             id = (data[1] >> 4) & 0xf; /* packet id */
-#if defined(LOGF_ENABLE)
+
             logf("button_read_device...");
             logf("  data[0] = 0x%08x", data[0]);
             logf("  data[1] = 0x%08x", data[1]);
             logf("  data[2] = 0x%08x", data[2]);
             logf("  data[3] = 0x%08x", data[3]);
-#endif
-            if ((val == BUTTONS_HEADER) && (id == BUTTONS_ID))
+
+            if ((val == MEP_BUTTON_HEADER) && (id == MEP_BUTTON_ID))
             {
                 /* Buttons packet - touched one of the 5 "buttons" */
                 if (data[1] & 0x1)
@@ -577,22 +120,21 @@ void button_int(void)
 
                 /* An Absolute packet should follow which we ignore */
                 val = syn_read_device(data, 4);
-#if defined(LOGF_ENABLE)
+
                 logf("  int_btn = 0x%04x", int_btn);
-#endif            
             }
-            else if (val == ABSOLUTE_HEADER)
+            else if (val == MEP_ABSOLUTE_HEADER)
             {
                 /* Absolute packet - the finger is on the vertical strip.
                    Position ranges from 1-4095, with 1 at the bottom. */
                 val = ((data[1] >> 4) << 8) | data[2]; /* position */
-#if defined(LOGF_ENABLE)                
+
                 logf(" pos %d", val);
                 logf(" z %d", data[3]);
                 logf(" finger %d", data[1] & 0x1);
                 logf(" gesture %d", data[1] & 0x2);
                 logf(" RelPosVld %d", data[1] & 0x4);
-#endif                
+
                 if(data[1] & 0x1)  /* if finger on touch strip */
                 {
                     if ((val > 0) && (val <= 1365))
@@ -607,7 +149,6 @@ void button_int(void)
 
         /* re-enable interrupts */
         GPIOD_INT_LEV &= ~0x2;
-        GPIOD_INT_CLR |=  0x2;
         GPIOD_INT_EN  |=  0x2;
     }
 }