Samsa AMS: start of an USB driver (nothing working atm)

Work based on AMD 5536 linux driver and AMD Geode CS5536 datasheet
Rockbox still doesn't reboot on USB insert

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21689 a1c6a512-1295-4272-9138-f99709370657

8 files changed, 319 insertions, 15 deletions

diff --git a/firmware/SOURCES b/firmware/SOURCES
index 6f932d1887..7c1a17ff7f 100644
--- a/firmware/SOURCES
+++ b/firmware/SOURCES
@@ -279,6 +279,8 @@ usbstack/usb_hid.c
 drivers/m66591.c
 #elif CONFIG_USBOTG == USBOTG_ARC
 target/arm/usb-drv-arc.c
+#elif CONFIG_USBOTG == USBOTG_AS3525
+target/arm/as3525/usb-drv-as3525.c
 #elif CONFIG_USBOTG == USBOTG_ISP1583
 drivers/isp1583.c
 #endif
diff --git a/firmware/export/as3525.h b/firmware/export/as3525.h
index 39e0706637..b7da19320d 100644
--- a/firmware/export/as3525.h
+++ b/firmware/export/as3525.h
@@ -500,4 +500,8 @@ interface */
 /* Timer frequency */
 #define TIMER_FREQ (24000000 / 16)
 
+/* USB : TODO */
+#define USB_NUM_ENDPOINTS 4
+#define USB_DEVBSS_ATTR IBSS_ATTR
+
 #endif /*__AS3525_H__*/
diff --git a/firmware/export/config-c200v2.h b/firmware/export/config-c200v2.h
index ae2cd04c0b..cde5e9b0e5 100644
--- a/firmware/export/config-c200v2.h
+++ b/firmware/export/config-c200v2.h
@@ -168,17 +168,21 @@
 /* Type of LCD : Samsung S6B33B2 */
 #define CONFIG_LCD LCD_C200
 
-#define USB_HANDLED_BY_OF
-
 #ifndef BOOTLOADER
 #define HAVE_MULTIVOLUME
 #define HAVE_HOTSWAP
-#endif
+
+#define USB_HANDLED_BY_OF
+
+#define CONFIG_USB USBOTG_AS3525
 
 /* enable these for the experimental usb stack */
-//#define HAVE_USBSTACK
-//#define USB_VENDOR_ID 0x0781
-//#define USB_PRODUCT_ID 0x7452
+#define HAVE_USBSTACK
+#define USB_VENDOR_ID 0x0781
+#define USB_PRODUCT_ID 0x7452
+
+#endif /* BOOTLOADER */
+
 /* Virtual LED (icon) */
 #define CONFIG_LED LED_VIRTUAL
 
diff --git a/firmware/export/config-clip.h b/firmware/export/config-clip.h
index 37b1a3185a..45b0a607c0 100644
--- a/firmware/export/config-clip.h
+++ b/firmware/export/config-clip.h
@@ -175,19 +175,14 @@
 
 #define USB_HANDLED_BY_OF
 
-#if 0 /* disabled since there is no USB driver */
-
-/* USB On-the-go */
-#define CONFIG_USBOTG USBOTG_ARC
+#define CONFIG_USB USBOTG_AS3525
 
 /* enable these for the experimental usb stack */
 #define HAVE_USBSTACK
 #define USB_VENDOR_ID 0x0781
 #define USB_PRODUCT_ID 0x7433
-#endif /* BOOTLOADER */
-
-#endif
 
+#endif /* BOOTLOADER */
 
 /* Virtual LED (icon) */
 #define CONFIG_LED LED_VIRTUAL
diff --git a/firmware/export/config-e200v2.h b/firmware/export/config-e200v2.h
index cc66b73249..a1c41fbe7d 100644
--- a/firmware/export/config-e200v2.h
+++ b/firmware/export/config-e200v2.h
@@ -190,7 +190,7 @@
 #define CONFIG_USBOTG USBOTG_AS3525
 
 /* enable these for the experimental usb stack */
-//#define HAVE_USBSTACK
+#define HAVE_USBSTACK
 #define USB_VENDOR_ID 0x0781
 #define USB_PRODUCT_ID 0x7423
 
diff --git a/firmware/export/config-fuze.h b/firmware/export/config-fuze.h
index c8fae9aca9..b9c5acb9b1 100644
--- a/firmware/export/config-fuze.h
+++ b/firmware/export/config-fuze.h
@@ -188,7 +188,7 @@
 #define CONFIG_USBOTG USBOTG_AS3525
 
 /* enable these for the experimental usb stack */
-//#define HAVE_USBSTACK
+#define HAVE_USBSTACK
 #define USB_VENDOR_ID 0x0781
 #define USB_PRODUCT_ID 0x7423
 
diff --git a/firmware/export/config-m200v4.h b/firmware/export/config-m200v4.h
index 16b704cea4..e23f3eb0e2 100644
--- a/firmware/export/config-m200v4.h
+++ b/firmware/export/config-m200v4.h
@@ -139,6 +139,19 @@
 /* Offset ( in the firmware file's header ) to the real data */
 #define FIRMWARE_OFFSET_FILE_DATA 8
 
+#ifndef BOOTLOADER
+
+#define USB_HANDLED_BY_OF
+
+#define CONFIG_USB USBOTG_AS3525
+
+/* enable these for the experimental usb stack */
+#define HAVE_USBSTACK
+#define USB_VENDOR_ID 0x0781
+#define USB_PRODUCT_ID 0x7431
+
+#endif /* BOOTLOADER */
+
 /* Software controlled LED */
 #define CONFIG_LED LED_VIRTUAL
 
diff --git a/firmware/target/arm/as3525/usb-drv-as3525.c b/firmware/target/arm/as3525/usb-drv-as3525.c
new file mode 100644
index 0000000000..bac5f6776b
--- /dev/null
+++ b/firmware/target/arm/as3525/usb-drv-as3525.c
@@ -0,0 +1,286 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright © 2009 Rafaël Carré
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include "usb.h"
+#include "usb_drv.h"
+#include "as3525.h"
+#include "clock-target.h"
+#include "ascodec.h"
+#include "as3514.h"
+#include <stdbool.h>
+
+/* 4 input endpoints */
+#define USB_IEP_CTRL(i)     *((volatile unsigned long*) USB_BASE + 0x0000 + (i*0x20))
+#define USB_IEP_STS(i)      *((volatile unsigned long*) USB_BASE + 0x0004 + (i*0x20))
+#define USB_IEP_TXFSIZE(i)  *((volatile unsigned long*) USB_BASE + 0x0008 + (i*0x20))
+#define USB_IEP_MPS(i)      *((volatile unsigned long*) USB_BASE + 0x000C + (i*0x20))
+#define USB_IEP_DESC_PTR(i) *((volatile unsigned long*) USB_BASE + 0x0014 + (i*0x20))
+#define USB_IEP_STS_MASK(i) *((volatile unsigned long*) USB_BASE + 0x0018 + (i*0x20))
+
+/* 4 output endpoints */
+#define USB_OEP_CTRL(i)     *((volatile unsigned long*) USB_BASE + 0x0200 + (i*0x20))
+#define USB_OEP_STS(i)      *((volatile unsigned long*) USB_BASE + 0x0204 + (i*0x20))
+#define USB_OEP_RXFR(i)     *((volatile unsigned long*) USB_BASE + 0x0208 + (i*0x20))
+#define USB_OEP_MPS(i)      *((volatile unsigned long*) USB_BASE + 0x020C + (i*0x20))
+#define USB_OEP_SUP_PTR(i)  *((volatile unsigned long*) USB_BASE + 0x0210 + (i*0x20))
+#define USB_OEP_DESC_PTR(i) *((volatile unsigned long*) USB_BASE + 0x0214 + (i*0x20))
+#define USB_OEP_STS_MASK(i) *((volatile unsigned long*) USB_BASE + 0x0218 + (i*0x20))
+
+#define USB_DEV_CFG             *((volatile unsigned long*) USB_BASE + 0x0400)
+#define USB_DEV_CTRL            *((volatile unsigned long*) USB_BASE + 0x0404)
+#define USB_DEV_STS             *((volatile unsigned long*) USB_BASE + 0x0408)
+#define USB_DEV_INTR            *((volatile unsigned long*) USB_BASE + 0x040C)
+#define USB_DEV_INTR_MASK       *((volatile unsigned long*) USB_BASE + 0x0410)
+#define USB_DEV_EP_INTR         *((volatile unsigned long*) USB_BASE + 0x0414)
+#define USB_DEV_EP_INTR_MASK    *((volatile unsigned long*) USB_BASE + 0x0418)
+
+#define USB_PHY_EP0_INFO        *((volatile unsigned long*) USB_BASE + 0x0504)
+#define USB_PHY_EP1_INFO        *((volatile unsigned long*) USB_BASE + 0x0508)
+#define USB_PHY_EP2_INFO        *((volatile unsigned long*) USB_BASE + 0x050C)
+#define USB_PHY_EP3_INFO        *((volatile unsigned long*) USB_BASE + 0x0510)
+#define USB_PHY_EP4_INFO        *((volatile unsigned long*) USB_BASE + 0x0514)
+#define USB_PHY_EP5_INFO        *((volatile unsigned long*) USB_BASE + 0x0518)
+
+/* 4 channels */
+#define USB_HOST_CH_SPLT(i)     *((volatile unsigned long*) USB_BASE + 0x1000 + (i*0x20))
+#define USB_HOST_CH_STS(i)      *((volatile unsigned long*) USB_BASE + 0x1004 + (i*0x20))
+#define USB_HOST_CH_TXFSIZE(i)  *((volatile unsigned long*) USB_BASE + 0x1008 + (i*0x20))
+#define USB_HOST_CH_REQ(i)      *((volatile unsigned long*) USB_BASE + 0x100C + (i*0x20))
+#define USB_HOST_CH_PER_INFO(i) *((volatile unsigned long*) USB_BASE + 0x1010 + (i*0x20))
+#define USB_HOST_CH_DESC_PTR(i) *((volatile unsigned long*) USB_BASE + 0x1014 + (i*0x20))
+#define USB_HOST_CH_STS_MASK(i) *((volatile unsigned long*) USB_BASE + 0x1018 + (i*0x20))
+
+#define USB_HOST_CFG            *((volatile unsigned long*) USB_BASE + 0x1400)
+#define USB_HOST_CTRL           *((volatile unsigned long*) USB_BASE + 0x1404)
+#define USB_HOST_INTR           *((volatile unsigned long*) USB_BASE + 0x140C)
+#define USB_HOST_INTR_MASK      *((volatile unsigned long*) USB_BASE + 0x1410)
+#define USB_HOST_CH_INTR        *((volatile unsigned long*) USB_BASE + 0x1414)
+#define USB_HOST_CH_INTR_MASK   *((volatile unsigned long*) USB_BASE + 0x1418)
+#define USB_HOST_FRAME_INT      *((volatile unsigned long*) USB_BASE + 0x141C)
+#define USB_HOST_FRAME_REM      *((volatile unsigned long*) USB_BASE + 0x1420)
+#define USB_HOST_FRAME_NUM      *((volatile unsigned long*) USB_BASE + 0x1424)
+
+#define USB_HOST_PORT0_CTRL_STS *((volatile unsigned long*) USB_BASE + 0x1500)
+
+#define USB_OTG_CSR             *((volatile unsigned long*) USB_BASE + 0x2000)
+#define USB_I2C_CSR             *((volatile unsigned long*) USB_BASE + 0x2004)
+#define USB_GPIO_CSR            *((volatile unsigned long*) USB_BASE + 0x2008)
+#define USB_SNPSID_CSR          *((volatile unsigned long*) USB_BASE + 0x200C)
+#define USB_USERID_CSR          *((volatile unsigned long*) USB_BASE + 0x2010)
+#define USB_USER_CONF1          *((volatile unsigned long*) USB_BASE + 0x2014)
+#define USB_USER_CONF2          *((volatile unsigned long*) USB_BASE + 0x2018)
+#define USB_USER_CONF3          *((volatile unsigned long*) USB_BASE + 0x201C)
+#define USB_USER_CONF4          *((volatile unsigned long*) USB_BASE + 0x2020)
+#define USB_USER_CONF5          *((volatile unsigned long*) USB_BASE + 0x2024)
+
+struct usb_endpoint
+{
+    void *buf;
+    unsigned int len;
+    union
+    {
+        unsigned int sent;
+        unsigned int received;
+    };
+    bool wait;
+    bool busy;
+};
+
+static struct usb_endpoint endpoints[USB_NUM_ENDPOINTS*2];
+
+void usb_attach(void)
+{
+    usb_enable(true);
+}
+
+void usb_drv_init(void)
+{
+    int i;
+    for(i = 0; i < USB_NUM_ENDPOINTS * 2; i++)
+        endpoints[i].busy = false;
+
+    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
+        | 1; /* source = PLLA */
+
+    /* 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 */
+
+
+    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(3)
+    sleep(1);
+    USB_GPIO_CSR &= ~0x200000; //sleep(10)
+    sleep(1);
+    USB_DEV_CTRL &= ~0x400; /* soft disconnect */
+
+    GPIOA_DIR |= (1<<6);
+    GPIOA_PIN(6) = (1<<6);
+
+#if 0 /* linux */
+    USB_DEV_CFG |= (1<<17)  /* csr programming */
+                |  (1<<3)   /* self powered */
+                |  (1<<2);  /* remote wakeup */
+
+    USB_DEV_CFG &= ~3; /* high speed */
+#endif
+
+    USB_IEP_CTRL(0) &= (3 << 4); /* control endpoint */
+    USB_IEP_DESC_PTR(0) = 0;
+
+    USB_OEP_CTRL(0) &= (3 << 4); /* control endpoint */
+    USB_OEP_DESC_PTR(0) = 0;
+
+    USB_DEV_INTR_MASK &= ~0xff;   /* unmask all flags */
+
+    USB_DEV_EP_INTR_MASK &= ~((1<<0) | (1<<16));    /* ep 0 */
+
+    VIC_INT_ENABLE |= INTERRUPT_USB;
+
+    USB_IEP_CTRL(0) |= (1<<7); /* set NAK */
+    USB_OEP_CTRL(0) |= (1<<7); /* set NAK */
+}
+
+void usb_drv_exit(void)
+{
+    USB_DEV_CTRL |= (1<<10); /* soft disconnect */
+    VIC_INT_EN_CLEAR = INTERRUPT_USB;
+    CGU_USB &= ~(1<<5);
+    CGU_PERI &= ~CGU_USB_CLOCK_ENABLE;
+    ascodec_write(AS3514_USB_UTIL, ascodec_read(AS3514_USB_UTIL) & ~(1<<4));
+}
+
+int usb_drv_port_speed(void)
+{
+    return (USB_DEV_CFG & 3) ? 0 : 1;
+}
+
+int usb_drv_request_endpoint(int type, int dir)
+{
+    (void) type;
+    int i = dir == USB_DIR_IN ? 0 : 1;
+
+    for(; i < USB_NUM_ENDPOINTS * 2; i += 2)
+        if(!endpoints[i].busy)
+        {
+            endpoints[i].busy = true;
+            i >>= 1;
+            USB_DEV_EP_INTR_MASK &= ~((1<<i) | (1<<(16+i)));
+            return i | dir;
+        }
+
+    return -1;
+}
+
+void usb_drv_release_endpoint(int ep)
+{
+    int i = (ep & 0x7f) * 2;
+    if(ep & USB_DIR_OUT)
+        i++;
+    endpoints[i].busy = false;
+    USB_DEV_EP_INTR_MASK |= (1<<ep) | (1<<(16+ep));
+}
+
+void usb_drv_cancel_all_transfers(void)
+{
+}
+
+int usb_drv_recv(int ep, void *ptr, int len)
+{
+    (void)ep;(void)ptr;(void)len;
+    if(ep >= 2)
+        return -1;
+
+    return -1;
+}
+
+int usb_drv_send(int ep, void *ptr, int len)
+{
+    (void)ep;(void)ptr;(void)len;
+    if(ep >= 2)
+        return -1;
+
+    return -1;
+}
+
+int usb_drv_send_nonblocking(int ep, void *ptr, int len)
+{
+    /* TODO */
+    return usb_drv_send(ep, ptr, len);
+}
+
+/* interrupt service routine */
+void INT_USB(void)
+{
+}
+
+/* (not essential? , not implemented in usb-tcc.c) */
+void usb_drv_set_test_mode(int mode)
+{
+    (void)mode;
+}
+
+void usb_drv_set_address(int address)
+{
+    (void)address;
+}
+
+void usb_drv_stall(int ep, bool stall, bool in)
+{
+    (void)ep;(void)stall;(void)in;
+}
+
+bool usb_drv_stalled(int ep, bool in)
+{
+    (void)ep;(void)in;
+    return true;
+}
+