From 8bd8d06842f9fe5d9c25d47c28f064052b375fa3 Mon Sep 17 00:00:00 2001
From: Rafaël Carré <rafael.carre@gmail.com>
Date: Thu, 15 Oct 2009 10:03:20 +0000
Subject: Sansa AMS USB driver : still not working

Implement usb_enable()
Reorder/Modify usb_drv_init() to match closer the OF and remove a freeze
(USB registers were accessed before the USB module was enabled)
Add a panic in USB isr to be sure we notice when it's called
Reset GPIOA direction for usb_detect() to notice extraction
Add some comments

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23184 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/target/arm/as3525/usb-as3525.c     |  6 +++-
 firmware/target/arm/as3525/usb-drv-as3525.c | 46 +++++++++++++----------------
 2 files changed, 26 insertions(+), 26 deletions(-)

(limited to 'firmware/target/arm/as3525')

diff --git a/firmware/target/arm/as3525/usb-as3525.c b/firmware/target/arm/as3525/usb-as3525.c
index 5e913789b5..c32aa3c249 100644
--- a/firmware/target/arm/as3525/usb-as3525.c
+++ b/firmware/target/arm/as3525/usb-as3525.c
@@ -22,6 +22,7 @@
 #include <stdbool.h>
 #include "config.h"
 #include "usb.h"
+#include "usb_core.h"
 #include "usb-target.h"
 #include "power.h"
 #include "as3525.h"
@@ -38,7 +39,10 @@
 
 void usb_enable(bool on)
 {
-    (void)on;
+    if (on)
+        usb_core_init();
+    else
+        usb_core_exit();
 }
 
 void usb_init_device(void)
diff --git a/firmware/target/arm/as3525/usb-drv-as3525.c b/firmware/target/arm/as3525/usb-drv-as3525.c
index bac5f6776b..8a1abea74f 100644
--- a/firmware/target/arm/as3525/usb-drv-as3525.c
+++ b/firmware/target/arm/as3525/usb-drv-as3525.c
@@ -26,6 +26,10 @@
 #include "ascodec.h"
 #include "as3514.h"
 #include <stdbool.h>
+#include "panic.h"
+//#define LOGF_ENABLE
+#include "logf.h"
+
 
 /* 4 input endpoints */
 #define USB_IEP_CTRL(i)     *((volatile unsigned long*) USB_BASE + 0x0000 + (i*0x20))
@@ -120,11 +124,6 @@ void usb_drv_init(void)
     ascodec_write(AS3514_CVDD_DCDC3, ascodec_read(AS3514_CVDD_DCDC3) | 1<<2);
     ascodec_write(AS3514_USB_UTIL, ascodec_read(AS3514_USB_UTIL) & ~(1<<4));
 
-    USB_GPIO_CSR |= 0x1C00000; //sleep(3)
-    sleep(1);
-    USB_GPIO_CSR |= 0x200000; //sleep(10)
-    sleep(1);
-
     /* PHY part */
     CGU_USB = 1<<5 /* enable */
         | (CLK_DIV(AS3525_PLLA_FREQ, 48000000) / 2) << 2
@@ -133,37 +132,33 @@ void usb_drv_init(void)
     /* AHB part */
     CGU_PERI |= CGU_USB_CLOCK_ENABLE;
 
-    /* UVDD */
-    ascodec_write(AS3514_USB_UTIL, ascodec_read(AS3514_USB_UTIL) | (1<<4));
-
-    sleep(10);
-
-    USB_DEV_CFG |= (1<<31); /* soft reset */
-    volatile int tmp = USB_DEV_CFG;
-    (void)tmp;
-
     USB_GPIO_CSR = 0x6180000;
-
     USB_DEV_CFG = (USB_DEV_CFG & ~3) | 1; /* full speed */
-
     USB_DEV_CTRL |= 0x400; /* soft disconnect */
 
+    /* UVDD */
+    ascodec_write(AS3514_USB_UTIL, ascodec_read(AS3514_USB_UTIL) | (1<<4));
+    sleep(10); //msleep(100)
+
+    USB_GPIO_CSR = 0x6180000;
 
-    USB_GPIO_CSR |= 0x1C00000; //sleep(3)
-    sleep(1);
-    USB_GPIO_CSR |= 0x200000; //sleep(10)
-    sleep(1);
+    USB_GPIO_CSR |= 0x1C00000;
+    sleep(1); //msleep(3)
+    USB_GPIO_CSR |= 0x200000;
+    sleep(1); //msleep(10)
 
     USB_DEV_CTRL |= 0x400; /* soft disconnect */
 
-    USB_GPIO_CSR &= ~0x1C00000; //sleep(3)
-    sleep(1);
-    USB_GPIO_CSR &= ~0x200000; //sleep(10)
-    sleep(1);
-    USB_DEV_CTRL &= ~0x400; /* soft disconnect */
+    USB_GPIO_CSR &= ~0x1C00000;
+    sleep(1); //msleep(3)
+    USB_GPIO_CSR &= ~0x200000;
+    sleep(1); //msleep(10)
+    USB_DEV_CTRL &= ~0x400; /* clear soft disconnect */
 
+    /* note : this pin might be Clip specific */
     GPIOA_DIR |= (1<<6);
     GPIOA_PIN(6) = (1<<6);
+    GPIOA_DIR &= ~(1<<6);   /* restore direction for usb_detect() */
 
 #if 0 /* linux */
     USB_DEV_CFG |= (1<<17)  /* csr programming */
@@ -260,6 +255,7 @@ int usb_drv_send_nonblocking(int ep, void *ptr, int len)
 /* interrupt service routine */
 void INT_USB(void)
 {
+    panicf("USB interrupt !");
 }
 
 /* (not essential? , not implemented in usb-tcc.c) */
-- 
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