The patch titled
spi: initial BF54x SPI support
has been added to the -mm tree. Its filename is
spi-initial-bf54x-spi-support.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: spi: initial BF54x SPI support
From: Bryan Wu <bryan.wu@xxxxxxxxxx>
Initial BF54x SPI support
- support BF54x SPI0
- clean up some code (whitespace etc)
- will support multiports in the future
- start using portmux calls
Signed-off-by: Bryan Wu <bryan.wu@xxxxxxxxxx>
Signed-off-by: David Brownell <dbrownell@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/spi/spi_bfin5xx.c | 139 ++++++--------
include/asm-blackfin/mach-bf548/defBF54x_base.h | 17 +
2 files changed, 86 insertions(+), 70 deletions(-)
diff -puN drivers/spi/spi_bfin5xx.c~spi-initial-bf54x-spi-support drivers/spi/spi_bfin5xx.c
--- a/drivers/spi/spi_bfin5xx.c~spi-initial-bf54x-spi-support
+++ a/drivers/spi/spi_bfin5xx.c
@@ -1,17 +1,20 @@
/*
- * File: drivers/spi/bfin5xx_spi.c
- * Based on: N/A
- * Author: Luke Yang (Analog Devices Inc.)
+ * File: drivers/spi/bfin5xx_spi.c
+ * Maintainer:
+ * Bryan Wu <bryan.wu@xxxxxxxxxx>
+ * Original Author:
+ * Luke Yang (Analog Devices Inc.)
*
- * Created: March. 10th 2006
- * Description: SPI controller driver for Blackfin 5xx
- * Bugs: Enter bugs at http://blackfin.uclinux.org/
+ * Created: March. 10th 2006
+ * Description: SPI controller driver for Blackfin BF5xx
+ * Bugs: Enter bugs at http://blackfin.uclinux.org/
*
* Modified:
* March 10, 2006 bfin5xx_spi.c Created. (Luke Yang)
* August 7, 2006 added full duplex mode (Axel Weiss & Luke Yang)
+ * July 17, 2007 add support for BF54x SPI0 controller (Bryan Wu)
*
- * Copyright 2004-2006 Analog Devices Inc.
+ * Copyright 2004-2007 Analog Devices Inc.
*
* 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
@@ -31,27 +34,27 @@
#include <linux/init.h>
#include <linux/module.h>
+#include <linux/delay.h>
#include <linux/device.h>
+#include <linux/io.h>
#include <linux/ioport.h>
+#include <linux/irq.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/spi/spi.h>
#include <linux/workqueue.h>
-#include <linux/delay.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/delay.h>
#include <asm/dma.h>
-
+#include <asm/portmux.h>
#include <asm/bfin5xx_spi.h>
-MODULE_AUTHOR("Luke Yang");
-MODULE_DESCRIPTION("Blackfin 5xx SPI Contoller");
+MODULE_AUTHOR("Bryan Wu, Luke Yang");
+MODULE_DESCRIPTION("Blackfin BF5xx SPI Contoller Driver");
MODULE_LICENSE("GPL");
+#define DRV_NAME "bfin-spi-master"
#define IS_DMA_ALIGNED(x) (((u32)(x)&0x07)==0)
#define DEFINE_SPI_REG(reg, off) \
@@ -124,6 +127,7 @@ struct chip_data {
u16 flag;
u8 chip_select_num;
+ u8 chip_select_requested;
u8 n_bytes;
u8 width; /* 0 or 1 */
u8 enable_dma;
@@ -188,53 +192,37 @@ static void restore_state(struct driver_
bfin_spi_disable(drv_data);
dev_dbg(&drv_data->pdev->dev, "restoring spi ctl state\n");
-#if defined(CONFIG_BF534) || defined(CONFIG_BF536) || defined(CONFIG_BF537)
- dev_dbg(&drv_data->pdev->dev,
- "chip select number is %d\n", chip->chip_select_num);
-
- switch (chip->chip_select_num) {
- case 1:
- bfin_write_PORTF_FER(bfin_read_PORTF_FER() | 0x3c00);
- SSYNC();
- break;
+ if (!chip->chip_select_requested) {
- case 2:
- case 3:
- bfin_write_PORT_MUX(bfin_read_PORT_MUX() | PJSE_SPI);
- SSYNC();
- bfin_write_PORTF_FER(bfin_read_PORTF_FER() | 0x3800);
- SSYNC();
- break;
-
- case 4:
- bfin_write_PORT_MUX(bfin_read_PORT_MUX() | PFS4E_SPI);
- SSYNC();
- bfin_write_PORTF_FER(bfin_read_PORTF_FER() | 0x3840);
- SSYNC();
- break;
-
- case 5:
- bfin_write_PORT_MUX(bfin_read_PORT_MUX() | PFS5E_SPI);
- SSYNC();
- bfin_write_PORTF_FER(bfin_read_PORTF_FER() | 0x3820);
- SSYNC();
- break;
+ dev_dbg(&drv_data->pdev->dev,
+ "chip select number is %d\n", chip->chip_select_num);
- case 6:
- bfin_write_PORT_MUX(bfin_read_PORT_MUX() | PFS6E_SPI);
- SSYNC();
- bfin_write_PORTF_FER(bfin_read_PORTF_FER() | 0x3810);
- SSYNC();
- break;
+ switch (chip->chip_select_num) {
+ case 1:
+ peripheral_request(P_SPI0_SSEL1, DRV_NAME);
+ break;
+ case 2:
+ peripheral_request(P_SPI0_SSEL2, DRV_NAME);
+ break;
+ case 3:
+ peripheral_request(P_SPI0_SSEL3, DRV_NAME);
+ break;
+ case 4:
+ peripheral_request(P_SPI0_SSEL4, DRV_NAME);
+ break;
+ case 5:
+ peripheral_request(P_SPI0_SSEL5, DRV_NAME);
+ break;
+ case 6:
+ peripheral_request(P_SPI0_SSEL6, DRV_NAME);
+ break;
+ case 7:
+ peripheral_request(P_SPI0_SSEL7, DRV_NAME);
+ break;
+ }
- case 7:
- bfin_write_PORT_MUX(bfin_read_PORT_MUX() | PJCE_SPI);
- SSYNC();
- bfin_write_PORTF_FER(bfin_read_PORTF_FER() | 0x3800);
- SSYNC();
- break;
+ chip->chip_select_requested = 1;
}
-#endif
/* Load the registers */
write_CTRL(chip->ctl_reg);
@@ -277,7 +265,7 @@ static void null_reader(struct driver_da
static void u8_writer(struct driver_data *drv_data)
{
- dev_dbg(&drv_data->pdev->dev,
+ dev_dbg(&drv_data->pdev->dev,
"cr8-s is 0x%x\n", read_STAT());
while (drv_data->tx < drv_data->tx_end) {
write_TDBR(*(u8 *) (drv_data->tx));
@@ -316,7 +304,7 @@ static void u8_cs_chg_writer(struct driv
static void u8_reader(struct driver_data *drv_data)
{
- dev_dbg(&drv_data->pdev->dev,
+ dev_dbg(&drv_data->pdev->dev,
"cr-8 is 0x%x\n", read_STAT());
/* clear TDBR buffer before read(else it will be shifted out) */
@@ -403,7 +391,7 @@ static void u8_cs_chg_duplex(struct driv
static void u16_writer(struct driver_data *drv_data)
{
- dev_dbg(&drv_data->pdev->dev,
+ dev_dbg(&drv_data->pdev->dev,
"cr16 is 0x%x\n", read_STAT());
while (drv_data->tx < drv_data->tx_end) {
@@ -700,9 +688,9 @@ static void pump_transfers(unsigned long
drv_data->write = drv_data->tx ? chip->write : null_writer;
drv_data->read = drv_data->rx ? chip->read : null_reader;
drv_data->duplex = chip->duplex ? chip->duplex : null_writer;
- dev_dbg(&drv_data->pdev->dev,
- "transfer: drv_data->write is %p, chip->write is %p, null_wr is %p\n",
- drv_data->write, chip->write, null_writer);
+ dev_dbg(&drv_data->pdev->dev, "transfer: ",
+ "drv_data->write is %p, chip->write is %p, null_wr is %p\n",
+ drv_data->write, chip->write, null_writer);
/* speed and width has been set on per message */
message->state = RUNNING_STATE;
@@ -816,7 +804,7 @@ static void pump_transfers(unsigned long
/* full duplex mode */
BUG_ON((drv_data->tx_end - drv_data->tx) !=
(drv_data->rx_end - drv_data->rx));
- cr = (read_CTRL() & (~BIT_CTL_TIMOD));
+ cr = (read_CTRL() & (~BIT_CTL_TIMOD));
cr |= CFG_SPI_WRITE | (width << 8) |
(CFG_SPI_ENABLE << 14);
dev_dbg(&drv_data->pdev->dev,
@@ -834,7 +822,7 @@ static void pump_transfers(unsigned long
cr = (read_CTRL() & (~BIT_CTL_TIMOD));
cr |= CFG_SPI_WRITE | (width << 8) |
(CFG_SPI_ENABLE << 14);
- dev_dbg(&drv_data->pdev->dev,
+ dev_dbg(&drv_data->pdev->dev,
"IO write: cr is 0x%x\n", cr);
write_CTRL(cr);
@@ -849,7 +837,7 @@ static void pump_transfers(unsigned long
cr = (read_CTRL() & (~BIT_CTL_TIMOD));
cr |= CFG_SPI_READ | (width << 8) |
(CFG_SPI_ENABLE << 14);
- dev_dbg(&drv_data->pdev->dev,
+ dev_dbg(&drv_data->pdev->dev,
"IO read: cr is 0x%x\n", cr);
write_CTRL(cr);
@@ -861,7 +849,7 @@ static void pump_transfers(unsigned long
}
if (!tranf_success) {
- dev_dbg(&drv_data->pdev->dev,
+ dev_dbg(&drv_data->pdev->dev,
"IO write error!\n");
message->state = ERROR_STATE;
} else {
@@ -881,9 +869,11 @@ static void pump_transfers(unsigned long
/* pop a msg from queue and kick off real transfer */
static void pump_messages(struct work_struct *work)
{
- struct driver_data *drv_data = container_of(work, struct driver_data, pump_messages);
+ struct driver_data *drv_data;
unsigned long flags;
+ drv_data = container_of(work, struct driver_data, pump_messages);
+
/* Lock queue and check for queue work */
spin_lock_irqsave(&drv_data->lock, flags);
if (list_empty(&drv_data->queue) || drv_data->run == QUEUE_STOPPED) {
@@ -916,8 +906,8 @@ static void pump_messages(struct work_st
"got a message to pump, state is set to: baud %d, flag 0x%x, ctl 0x%x\n",
drv_data->cur_chip->baud, drv_data->cur_chip->flag,
drv_data->cur_chip->ctl_reg);
-
- dev_dbg(&drv_data->pdev->dev,
+
+ dev_dbg(&drv_data->pdev->dev,
"the first transfer len is %d\n",
drv_data->cur_transfer->len);
@@ -1193,6 +1183,15 @@ static int __init bfin5xx_spi_probe(stru
dev_err(&pdev->dev, "can not alloc spi_master\n");
return -ENOMEM;
}
+
+ if (peripheral_request(P_SPI0_SCK, DRV_NAME) ||
+ peripheral_request(P_SPI0_MISO, DRV_NAME) ||
+ peripheral_request(P_SPI0_MOSI, DRV_NAME)) {
+
+ dev_err(&pdev->dev, ": Requesting Peripherals failed\n");
+ goto out_error_queue_alloc;
+ }
+
drv_data = spi_master_get_devdata(master);
drv_data->master = master;
drv_data->master_info = platform_info;
diff -puN include/asm-blackfin/mach-bf548/defBF54x_base.h~spi-initial-bf54x-spi-support include/asm-blackfin/mach-bf548/defBF54x_base.h
--- a/include/asm-blackfin/mach-bf548/defBF54x_base.h~spi-initial-bf54x-spi-support
+++ a/include/asm-blackfin/mach-bf548/defBF54x_base.h
@@ -1644,8 +1644,25 @@
#define RESTART 0x20 /* Work Unit Transitions */
#define DI_SEL 0x40 /* Data Interrupt Timing Select */
#define DI_EN 0x80 /* Data Interrupt Enable */
+
#define NDSIZE 0xf00 /* Flex Descriptor Size */
+#define NDSIZE_0 0x0000 /* Next Descriptor Size = 0 (Stop/Autobuffer) */
+#define NDSIZE_1 0x0100 /* Next Descriptor Size = 1 */
+#define NDSIZE_2 0x0200 /* Next Descriptor Size = 2 */
+#define NDSIZE_3 0x0300 /* Next Descriptor Size = 3 */
+#define NDSIZE_4 0x0400 /* Next Descriptor Size = 4 */
+#define NDSIZE_5 0x0500 /* Next Descriptor Size = 5 */
+#define NDSIZE_6 0x0600 /* Next Descriptor Size = 6 */
+#define NDSIZE_7 0x0700 /* Next Descriptor Size = 7 */
+#define NDSIZE_8 0x0800 /* Next Descriptor Size = 8 */
+#define NDSIZE_9 0x0900 /* Next Descriptor Size = 9 */
+
#define DMAFLOW 0xf000 /* Next Operation */
+#define DMAFLOW_STOP 0x0000 /* Stop Mode */
+#define DMAFLOW_AUTO 0x1000 /* Autobuffer Mode */
+#define DMAFLOW_ARRAY 0x4000 /* Descriptor Array Mode */
+#define DMAFLOW_SMALL 0x6000 /* Small Model Descriptor List Mode */
+#define DMAFLOW_LARGE 0x7000 /* Large Model Descriptor List Mode */
/* Bit masks for DMAx_IRQ_STATUS, MDMA_Sx_IRQ_STATUS, MDMA_Dx_IRQ_STATUS */
_
Patches currently in -mm which might be from bryan.wu@xxxxxxxxxx are
origin.patch
git-mtd.patch
blackfin-serial-driver-this-driver-enable-sports-on-blackfin-emulate-uart.patch
kernel-printkc-concerns-about-the-console-handover.patch
spi-initial-bf54x-spi-support.patch
spi-bfin-spi-uses-portmux-calls.patch
spi-spi_bfin-cleanups-error-handling.patch
spi-spi_bfin-handles-spi_transfercs_change.patch
spi-spi_bfin-dont-bypass-spi-framework.patch
spi-spi_bfin-uses-platform-device-resources.patch
spi-spi_bfin-uses-portmux-for-additional-busses.patch
spi-spi_bfin-rearrange-portmux-calls.patch
spi-spi_bfin-change-handling-of-communication-parameters.patch
spi-spi_bfin-relocate-spin-waits.patch
spi-spi_bfin-handle-multiple-spi_masters.patch
spi-spi_bfin-bugfix-for-816-bit-word-sizes.patch
spi-spi_bfin-update-handling-of-delay-after-deselect.patch
spi-spi_bfin-resequence-dma-start-stop.patch
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