mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
spi: initial BF54x SPI support
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@analog.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
parent
c24b2602af
commit
131b17d42d
2 changed files with 86 additions and 70 deletions
|
@ -1,17 +1,20 @@
|
||||||
/*
|
/*
|
||||||
* File: drivers/spi/bfin5xx_spi.c
|
* File: drivers/spi/bfin5xx_spi.c
|
||||||
* Based on: N/A
|
* Maintainer:
|
||||||
* Author: Luke Yang (Analog Devices Inc.)
|
* Bryan Wu <bryan.wu@analog.com>
|
||||||
|
* Original Author:
|
||||||
|
* Luke Yang (Analog Devices Inc.)
|
||||||
*
|
*
|
||||||
* Created: March. 10th 2006
|
* Created: March. 10th 2006
|
||||||
* Description: SPI controller driver for Blackfin 5xx
|
* Description: SPI controller driver for Blackfin BF5xx
|
||||||
* Bugs: Enter bugs at http://blackfin.uclinux.org/
|
* Bugs: Enter bugs at http://blackfin.uclinux.org/
|
||||||
*
|
*
|
||||||
* Modified:
|
* Modified:
|
||||||
* March 10, 2006 bfin5xx_spi.c Created. (Luke Yang)
|
* March 10, 2006 bfin5xx_spi.c Created. (Luke Yang)
|
||||||
* August 7, 2006 added full duplex mode (Axel Weiss & 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
|
* 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
|
* it under the terms of the GNU General Public License as published by
|
||||||
|
@ -31,27 +34,27 @@
|
||||||
|
|
||||||
#include <linux/init.h>
|
#include <linux/init.h>
|
||||||
#include <linux/module.h>
|
#include <linux/module.h>
|
||||||
|
#include <linux/delay.h>
|
||||||
#include <linux/device.h>
|
#include <linux/device.h>
|
||||||
|
#include <linux/io.h>
|
||||||
#include <linux/ioport.h>
|
#include <linux/ioport.h>
|
||||||
|
#include <linux/irq.h>
|
||||||
#include <linux/errno.h>
|
#include <linux/errno.h>
|
||||||
#include <linux/interrupt.h>
|
#include <linux/interrupt.h>
|
||||||
#include <linux/platform_device.h>
|
#include <linux/platform_device.h>
|
||||||
#include <linux/dma-mapping.h>
|
#include <linux/dma-mapping.h>
|
||||||
#include <linux/spi/spi.h>
|
#include <linux/spi/spi.h>
|
||||||
#include <linux/workqueue.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/dma.h>
|
||||||
|
#include <asm/portmux.h>
|
||||||
#include <asm/bfin5xx_spi.h>
|
#include <asm/bfin5xx_spi.h>
|
||||||
|
|
||||||
MODULE_AUTHOR("Luke Yang");
|
MODULE_AUTHOR("Bryan Wu, Luke Yang");
|
||||||
MODULE_DESCRIPTION("Blackfin 5xx SPI Contoller");
|
MODULE_DESCRIPTION("Blackfin BF5xx SPI Contoller Driver");
|
||||||
MODULE_LICENSE("GPL");
|
MODULE_LICENSE("GPL");
|
||||||
|
|
||||||
|
#define DRV_NAME "bfin-spi-master"
|
||||||
#define IS_DMA_ALIGNED(x) (((u32)(x)&0x07)==0)
|
#define IS_DMA_ALIGNED(x) (((u32)(x)&0x07)==0)
|
||||||
|
|
||||||
#define DEFINE_SPI_REG(reg, off) \
|
#define DEFINE_SPI_REG(reg, off) \
|
||||||
|
@ -124,6 +127,7 @@ struct chip_data {
|
||||||
u16 flag;
|
u16 flag;
|
||||||
|
|
||||||
u8 chip_select_num;
|
u8 chip_select_num;
|
||||||
|
u8 chip_select_requested;
|
||||||
u8 n_bytes;
|
u8 n_bytes;
|
||||||
u8 width; /* 0 or 1 */
|
u8 width; /* 0 or 1 */
|
||||||
u8 enable_dma;
|
u8 enable_dma;
|
||||||
|
@ -188,53 +192,37 @@ static void restore_state(struct driver_data *drv_data)
|
||||||
bfin_spi_disable(drv_data);
|
bfin_spi_disable(drv_data);
|
||||||
dev_dbg(&drv_data->pdev->dev, "restoring spi ctl state\n");
|
dev_dbg(&drv_data->pdev->dev, "restoring spi ctl state\n");
|
||||||
|
|
||||||
#if defined(CONFIG_BF534) || defined(CONFIG_BF536) || defined(CONFIG_BF537)
|
if (!chip->chip_select_requested) {
|
||||||
dev_dbg(&drv_data->pdev->dev,
|
|
||||||
|
dev_dbg(&drv_data->pdev->dev,
|
||||||
"chip select number is %d\n", chip->chip_select_num);
|
"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;
|
|
||||||
|
|
||||||
case 2:
|
switch (chip->chip_select_num) {
|
||||||
case 3:
|
case 1:
|
||||||
bfin_write_PORT_MUX(bfin_read_PORT_MUX() | PJSE_SPI);
|
peripheral_request(P_SPI0_SSEL1, DRV_NAME);
|
||||||
SSYNC();
|
break;
|
||||||
bfin_write_PORTF_FER(bfin_read_PORTF_FER() | 0x3800);
|
case 2:
|
||||||
SSYNC();
|
peripheral_request(P_SPI0_SSEL2, DRV_NAME);
|
||||||
break;
|
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 4:
|
chip->chip_select_requested = 1;
|
||||||
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;
|
|
||||||
|
|
||||||
case 6:
|
|
||||||
bfin_write_PORT_MUX(bfin_read_PORT_MUX() | PFS6E_SPI);
|
|
||||||
SSYNC();
|
|
||||||
bfin_write_PORTF_FER(bfin_read_PORTF_FER() | 0x3810);
|
|
||||||
SSYNC();
|
|
||||||
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;
|
|
||||||
}
|
}
|
||||||
#endif
|
|
||||||
|
|
||||||
/* Load the registers */
|
/* Load the registers */
|
||||||
write_CTRL(chip->ctl_reg);
|
write_CTRL(chip->ctl_reg);
|
||||||
|
@ -277,7 +265,7 @@ static void null_reader(struct driver_data *drv_data)
|
||||||
|
|
||||||
static void u8_writer(struct driver_data *drv_data)
|
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());
|
"cr8-s is 0x%x\n", read_STAT());
|
||||||
while (drv_data->tx < drv_data->tx_end) {
|
while (drv_data->tx < drv_data->tx_end) {
|
||||||
write_TDBR(*(u8 *) (drv_data->tx));
|
write_TDBR(*(u8 *) (drv_data->tx));
|
||||||
|
@ -316,7 +304,7 @@ static void u8_cs_chg_writer(struct driver_data *drv_data)
|
||||||
|
|
||||||
static void u8_reader(struct driver_data *drv_data)
|
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());
|
"cr-8 is 0x%x\n", read_STAT());
|
||||||
|
|
||||||
/* clear TDBR buffer before read(else it will be shifted out) */
|
/* clear TDBR buffer before read(else it will be shifted out) */
|
||||||
|
@ -403,7 +391,7 @@ static void u8_cs_chg_duplex(struct driver_data *drv_data)
|
||||||
|
|
||||||
static void u16_writer(struct driver_data *drv_data)
|
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());
|
"cr16 is 0x%x\n", read_STAT());
|
||||||
|
|
||||||
while (drv_data->tx < drv_data->tx_end) {
|
while (drv_data->tx < drv_data->tx_end) {
|
||||||
|
@ -700,9 +688,9 @@ static void pump_transfers(unsigned long data)
|
||||||
drv_data->write = drv_data->tx ? chip->write : null_writer;
|
drv_data->write = drv_data->tx ? chip->write : null_writer;
|
||||||
drv_data->read = drv_data->rx ? chip->read : null_reader;
|
drv_data->read = drv_data->rx ? chip->read : null_reader;
|
||||||
drv_data->duplex = chip->duplex ? chip->duplex : null_writer;
|
drv_data->duplex = chip->duplex ? chip->duplex : null_writer;
|
||||||
dev_dbg(&drv_data->pdev->dev,
|
dev_dbg(&drv_data->pdev->dev, "transfer: ",
|
||||||
"transfer: drv_data->write is %p, chip->write is %p, null_wr is %p\n",
|
"drv_data->write is %p, chip->write is %p, null_wr is %p\n",
|
||||||
drv_data->write, chip->write, null_writer);
|
drv_data->write, chip->write, null_writer);
|
||||||
|
|
||||||
/* speed and width has been set on per message */
|
/* speed and width has been set on per message */
|
||||||
message->state = RUNNING_STATE;
|
message->state = RUNNING_STATE;
|
||||||
|
@ -816,7 +804,7 @@ static void pump_transfers(unsigned long data)
|
||||||
/* full duplex mode */
|
/* full duplex mode */
|
||||||
BUG_ON((drv_data->tx_end - drv_data->tx) !=
|
BUG_ON((drv_data->tx_end - drv_data->tx) !=
|
||||||
(drv_data->rx_end - drv_data->rx));
|
(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) |
|
cr |= CFG_SPI_WRITE | (width << 8) |
|
||||||
(CFG_SPI_ENABLE << 14);
|
(CFG_SPI_ENABLE << 14);
|
||||||
dev_dbg(&drv_data->pdev->dev,
|
dev_dbg(&drv_data->pdev->dev,
|
||||||
|
@ -834,7 +822,7 @@ static void pump_transfers(unsigned long data)
|
||||||
cr = (read_CTRL() & (~BIT_CTL_TIMOD));
|
cr = (read_CTRL() & (~BIT_CTL_TIMOD));
|
||||||
cr |= CFG_SPI_WRITE | (width << 8) |
|
cr |= CFG_SPI_WRITE | (width << 8) |
|
||||||
(CFG_SPI_ENABLE << 14);
|
(CFG_SPI_ENABLE << 14);
|
||||||
dev_dbg(&drv_data->pdev->dev,
|
dev_dbg(&drv_data->pdev->dev,
|
||||||
"IO write: cr is 0x%x\n", cr);
|
"IO write: cr is 0x%x\n", cr);
|
||||||
|
|
||||||
write_CTRL(cr);
|
write_CTRL(cr);
|
||||||
|
@ -849,7 +837,7 @@ static void pump_transfers(unsigned long data)
|
||||||
cr = (read_CTRL() & (~BIT_CTL_TIMOD));
|
cr = (read_CTRL() & (~BIT_CTL_TIMOD));
|
||||||
cr |= CFG_SPI_READ | (width << 8) |
|
cr |= CFG_SPI_READ | (width << 8) |
|
||||||
(CFG_SPI_ENABLE << 14);
|
(CFG_SPI_ENABLE << 14);
|
||||||
dev_dbg(&drv_data->pdev->dev,
|
dev_dbg(&drv_data->pdev->dev,
|
||||||
"IO read: cr is 0x%x\n", cr);
|
"IO read: cr is 0x%x\n", cr);
|
||||||
|
|
||||||
write_CTRL(cr);
|
write_CTRL(cr);
|
||||||
|
@ -861,7 +849,7 @@ static void pump_transfers(unsigned long data)
|
||||||
}
|
}
|
||||||
|
|
||||||
if (!tranf_success) {
|
if (!tranf_success) {
|
||||||
dev_dbg(&drv_data->pdev->dev,
|
dev_dbg(&drv_data->pdev->dev,
|
||||||
"IO write error!\n");
|
"IO write error!\n");
|
||||||
message->state = ERROR_STATE;
|
message->state = ERROR_STATE;
|
||||||
} else {
|
} else {
|
||||||
|
@ -881,9 +869,11 @@ static void pump_transfers(unsigned long data)
|
||||||
/* pop a msg from queue and kick off real transfer */
|
/* pop a msg from queue and kick off real transfer */
|
||||||
static void pump_messages(struct work_struct *work)
|
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;
|
unsigned long flags;
|
||||||
|
|
||||||
|
drv_data = container_of(work, struct driver_data, pump_messages);
|
||||||
|
|
||||||
/* Lock queue and check for queue work */
|
/* Lock queue and check for queue work */
|
||||||
spin_lock_irqsave(&drv_data->lock, flags);
|
spin_lock_irqsave(&drv_data->lock, flags);
|
||||||
if (list_empty(&drv_data->queue) || drv_data->run == QUEUE_STOPPED) {
|
if (list_empty(&drv_data->queue) || drv_data->run == QUEUE_STOPPED) {
|
||||||
|
@ -916,8 +906,8 @@ static void pump_messages(struct work_struct *work)
|
||||||
"got a message to pump, state is set to: baud %d, flag 0x%x, ctl 0x%x\n",
|
"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->baud, drv_data->cur_chip->flag,
|
||||||
drv_data->cur_chip->ctl_reg);
|
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",
|
"the first transfer len is %d\n",
|
||||||
drv_data->cur_transfer->len);
|
drv_data->cur_transfer->len);
|
||||||
|
|
||||||
|
@ -1193,6 +1183,15 @@ static int __init bfin5xx_spi_probe(struct platform_device *pdev)
|
||||||
dev_err(&pdev->dev, "can not alloc spi_master\n");
|
dev_err(&pdev->dev, "can not alloc spi_master\n");
|
||||||
return -ENOMEM;
|
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 = spi_master_get_devdata(master);
|
||||||
drv_data->master = master;
|
drv_data->master = master;
|
||||||
drv_data->master_info = platform_info;
|
drv_data->master_info = platform_info;
|
||||||
|
|
|
@ -1644,8 +1644,25 @@
|
||||||
#define RESTART 0x20 /* Work Unit Transitions */
|
#define RESTART 0x20 /* Work Unit Transitions */
|
||||||
#define DI_SEL 0x40 /* Data Interrupt Timing Select */
|
#define DI_SEL 0x40 /* Data Interrupt Timing Select */
|
||||||
#define DI_EN 0x80 /* Data Interrupt Enable */
|
#define DI_EN 0x80 /* Data Interrupt Enable */
|
||||||
|
|
||||||
#define NDSIZE 0xf00 /* Flex Descriptor Size */
|
#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 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 */
|
/* Bit masks for DMAx_IRQ_STATUS, MDMA_Sx_IRQ_STATUS, MDMA_Dx_IRQ_STATUS */
|
||||||
|
|
||||||
|
|
Loading…
Reference in a new issue