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author | Imre Kaloz <kaloz@openwrt.org> | 2011-05-30 13:55:34 +0000 |
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committer | Imre Kaloz <kaloz@openwrt.org> | 2011-05-30 13:55:34 +0000 |
commit | f738ca7b9cce36a8cca77595a3d18e17a9a2509e (patch) | |
tree | 6a053973d87f82d38afe94ca3ff615c23543b9ce /target/linux/cns3xxx/patches/052-cns3xxx_spi.patch | |
parent | 7f0fc7b0cf1bb861fbf05d2a6b002edc097e4bae (diff) | |
download | mtk-20170518-f738ca7b9cce36a8cca77595a3d18e17a9a2509e.zip mtk-20170518-f738ca7b9cce36a8cca77595a3d18e17a9a2509e.tar.gz mtk-20170518-f738ca7b9cce36a8cca77595a3d18e17a9a2509e.tar.bz2 |
upgrade to 2.6.39
SVN-Revision: 27030
Diffstat (limited to 'target/linux/cns3xxx/patches/052-cns3xxx_spi.patch')
-rw-r--r-- | target/linux/cns3xxx/patches/052-cns3xxx_spi.patch | 509 |
1 files changed, 509 insertions, 0 deletions
diff --git a/target/linux/cns3xxx/patches/052-cns3xxx_spi.patch b/target/linux/cns3xxx/patches/052-cns3xxx_spi.patch new file mode 100644 index 0000000..1432800 --- /dev/null +++ b/target/linux/cns3xxx/patches/052-cns3xxx_spi.patch @@ -0,0 +1,509 @@ +--- a/drivers/spi/Kconfig ++++ b/drivers/spi/Kconfig +@@ -114,6 +114,13 @@ config SPI_BUTTERFLY + inexpensive battery powered microcontroller evaluation board. + This same cable can be used to flash new firmware. + ++config SPI_CNS3XXX ++ tristate "CNS3XXX SPI controller" ++ depends on ARCH_CNS3XXX && SPI_MASTER ++ select SPI_BITBANG ++ help ++ This enables using the CNS3XXX SPI controller in master mode. ++ + config SPI_COLDFIRE_QSPI + tristate "Freescale Coldfire QSPI controller" + depends on (M520x || M523x || M5249 || M527x || M528x || M532x) +--- a/drivers/spi/Makefile ++++ b/drivers/spi/Makefile +@@ -55,6 +55,7 @@ obj-$(CONFIG_SPI_SH_SCI) += spi_sh_sci. + obj-$(CONFIG_SPI_SH_MSIOF) += spi_sh_msiof.o + obj-$(CONFIG_SPI_STMP3XXX) += spi_stmp.o + obj-$(CONFIG_SPI_NUC900) += spi_nuc900.o ++obj-$(CONFIG_SPI_CNS3XXX) += spi_cns3xxx.o + + # special build for s3c24xx spi driver with fiq support + spi_s3c24xx_hw-y := spi_s3c24xx.o +--- /dev/null ++++ b/drivers/spi/spi_cns3xxx.c +@@ -0,0 +1,449 @@ ++/******************************************************************************* ++ * ++ * CNS3XXX SPI controller driver (master mode only) ++ * ++ * Copyright (c) 2008 Cavium Networks ++ * Copyright 2011 Gateworks Corporation ++ * Chris Lang <clang@gateworks.com> ++ * ++ * This file is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License, Version 2, as ++ * published by the Free Software Foundation. ++ * ++ * This file is distributed in the hope that it will be useful, ++ * but AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or ++ * NONINFRINGEMENT. See the GNU General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this file; if not, write to the Free Software ++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA or ++ * visit http://www.gnu.org/licenses/. ++ * ++ * This file may also be available under a different license from Cavium. ++ * Contact Cavium Networks for more information ++ * ++ ******************************************************************************/ ++ ++#include <linux/init.h> ++#include <linux/spinlock.h> ++#include <linux/workqueue.h> ++#include <linux/interrupt.h> ++#include <linux/delay.h> ++#include <linux/errno.h> ++#include <linux/err.h> ++#include <linux/clk.h> ++#include <linux/platform_device.h> ++ ++#include <linux/spi/spi.h> ++#include <linux/spi/spi_bitbang.h> ++#include <linux/mtd/partitions.h> ++#include <linux/dma-mapping.h> ++#include <linux/slab.h> ++ ++#include <asm/io.h> ++#include <asm/memory.h> ++#include <asm/dma.h> ++#include <asm/delay.h> ++#include <mach/cns3xxx.h> ++#include <linux/module.h> ++#include <mach/pm.h> ++ ++/* ++ * define access macros ++ */ ++#define SPI_MEM_MAP_VALUE(reg_offset) (*((u32 volatile *)(CNS3XXX_SSP_BASE_VIRT + reg_offset))) ++ ++#define SPI_CONFIGURATION_REG SPI_MEM_MAP_VALUE(0x40) ++#define SPI_SERVICE_STATUS_REG SPI_MEM_MAP_VALUE(0x44) ++#define SPI_BIT_RATE_CONTROL_REG SPI_MEM_MAP_VALUE(0x48) ++#define SPI_TRANSMIT_CONTROL_REG SPI_MEM_MAP_VALUE(0x4C) ++#define SPI_TRANSMIT_BUFFER_REG SPI_MEM_MAP_VALUE(0x50) ++#define SPI_RECEIVE_CONTROL_REG SPI_MEM_MAP_VALUE(0x54) ++#define SPI_RECEIVE_BUFFER_REG SPI_MEM_MAP_VALUE(0x58) ++#define SPI_FIFO_TRANSMIT_CONFIG_REG SPI_MEM_MAP_VALUE(0x5C) ++#define SPI_FIFO_TRANSMIT_CONTROL_REG SPI_MEM_MAP_VALUE(0x60) ++#define SPI_FIFO_RECEIVE_CONFIG_REG SPI_MEM_MAP_VALUE(0x64) ++#define SPI_INTERRUPT_STATUS_REG SPI_MEM_MAP_VALUE(0x68) ++#define SPI_INTERRUPT_ENABLE_REG SPI_MEM_MAP_VALUE(0x6C) ++ ++#define SPI_TRANSMIT_BUFFER_REG_ADDR (CNS3XXX_SSP_BASE +0x50) ++#define SPI_RECEIVE_BUFFER_REG_ADDR (CNS3XXX_SSP_BASE +0x58) ++ ++/* Structure for SPI controller of CNS3XXX SOCs */ ++struct cns3xxx_spi { ++ /* bitbang has to be first */ ++ struct spi_bitbang bitbang; ++ struct completion done; ++ wait_queue_head_t wait; ++ ++ int len; ++ int count; ++ int last_in_message_list; ++ ++ /* data buffers */ ++ const unsigned char *tx; ++ unsigned char *rx; ++ ++ struct spi_master *master; ++ struct platform_device *pdev; ++ struct device *dev; ++}; ++ ++static inline u8 cns3xxx_spi_bus_idle(void) ++{ ++ return ((SPI_SERVICE_STATUS_REG & 0x1) ? 0 : 1); ++} ++ ++static inline u8 cns3xxx_spi_tx_buffer_empty(void) ++{ ++ return ((SPI_INTERRUPT_STATUS_REG & (0x1 << 3)) ? 1 : 0); ++} ++ ++static inline u8 cns3xxx_spi_rx_buffer_full(void) ++{ ++ return ((SPI_INTERRUPT_STATUS_REG & (0x1 << 2)) ? 1 : 0); ++} ++ ++u8 cns3xxx_spi_tx_rx(u8 tx_channel, u8 tx_eof, u32 tx_data, ++ u32 * rx_data) ++{ ++ u8 rx_channel; ++ u8 rx_eof; ++ ++ while (!cns3xxx_spi_bus_idle()) ; // do nothing ++ ++ while (!cns3xxx_spi_tx_buffer_empty()) ; // do nothing ++ ++ SPI_TRANSMIT_CONTROL_REG &= ~(0x7); ++ SPI_TRANSMIT_CONTROL_REG |= (tx_channel & 0x3) | ((tx_eof & 0x1) << 2); ++ ++ SPI_TRANSMIT_BUFFER_REG = tx_data; ++ ++ while (!cns3xxx_spi_rx_buffer_full()) ; // do nothing ++ ++ rx_channel = SPI_RECEIVE_CONTROL_REG & 0x3; ++ rx_eof = (SPI_RECEIVE_CONTROL_REG & (0x1 << 2)) ? 1 : 0; ++ ++ *rx_data = SPI_RECEIVE_BUFFER_REG; ++ ++ if ((tx_channel != rx_channel) || (tx_eof != rx_eof)) { ++ return 0; ++ } else { ++ return 1; ++ } ++} ++ ++u8 cns3xxx_spi_tx(u8 tx_channel, u8 tx_eof, u32 tx_data) ++{ ++ ++ while (!cns3xxx_spi_bus_idle()) ; // do nothing ++ ++ while (!cns3xxx_spi_tx_buffer_empty()) ; // do nothing ++ ++ SPI_TRANSMIT_CONTROL_REG &= ~(0x7); ++ SPI_TRANSMIT_CONTROL_REG |= (tx_channel & 0x3) | ((tx_eof & 0x1) << 2); ++ ++ SPI_TRANSMIT_BUFFER_REG = tx_data; ++ ++ return 1; ++} ++ ++static inline struct cns3xxx_spi *to_hw(struct spi_device *sdev) ++{ ++ return spi_master_get_devdata(sdev->master); ++} ++ ++static int cns3xxx_spi_setup_transfer(struct spi_device *spi, ++ struct spi_transfer *t) ++{ ++ return 0; ++} ++ ++static void cns3xxx_spi_chipselect(struct spi_device *spi, int value) ++{ ++ unsigned int spi_config; ++ ++ switch (value) { ++ case BITBANG_CS_INACTIVE: ++ break; ++ ++ case BITBANG_CS_ACTIVE: ++ spi_config = SPI_CONFIGURATION_REG; ++ ++ if (spi->mode & SPI_CPHA) ++ spi_config |= (0x1 << 13); ++ else ++ spi_config &= ~(0x1 << 13); ++ ++ if (spi->mode & SPI_CPOL) ++ spi_config |= (0x1 << 14); ++ else ++ spi_config &= ~(0x1 << 14); ++ ++ /* write new configration */ ++ SPI_CONFIGURATION_REG = spi_config; ++ ++ SPI_TRANSMIT_CONTROL_REG &= ~(0x7); ++ SPI_TRANSMIT_CONTROL_REG |= (spi->chip_select & 0x3); ++ ++ break; ++ } ++} ++ ++static int cns3xxx_spi_setup(struct spi_device *spi) ++{ ++ if (!spi->bits_per_word) ++ spi->bits_per_word = 8; ++ ++ return 0; ++} ++ ++static int cns3xxx_spi_txrx(struct spi_device *spi, struct spi_transfer *t) ++{ ++ struct cns3xxx_spi *hw = to_hw(spi); ++ ++ dev_dbg(&spi->dev, "txrx: tx %p, rx %p, len %d\n", t->tx_buf, t->rx_buf, ++ t->len); ++ ++ hw->tx = t->tx_buf; ++ hw->rx = t->rx_buf; ++ hw->len = t->len; ++ hw->count = 0; ++ hw->last_in_message_list = t->last_in_message_list; ++ ++ init_completion(&hw->done); ++ ++ if (hw->tx) { ++ int i; ++ u32 rx_data; ++ for (i = 0; i < (hw->len - 1); i++) { ++ dev_dbg(&spi->dev, ++ "[SPI_CNS3XXX_DEBUG] hw->tx[%02d]: 0x%02x\n", i, ++ hw->tx[i]); ++ cns3xxx_spi_tx_rx(spi->chip_select, 0, hw->tx[i], ++ &rx_data); ++ if (hw->rx) { ++ hw->rx[i] = rx_data; ++ dev_dbg(&spi->dev, ++ "[SPI_CNS3XXX_DEBUG] hw->rx[%02d]: 0x%02x\n", ++ i, hw->rx[i]); ++ } ++ } ++ ++ if (t->last_in_message_list) { ++ cns3xxx_spi_tx_rx(spi->chip_select, 1, hw->tx[i], ++ &rx_data); ++ if (hw->rx) { ++ hw->rx[i] = rx_data; ++ dev_dbg(&spi->dev, ++ "[SPI_CNS3XXX_DEBUG] hw->rx[%02d]: 0x%02x\n", ++ i, hw->rx[i]); ++ } ++ } else { ++ cns3xxx_spi_tx_rx(spi->chip_select, 0, hw->tx[i], ++ &rx_data); ++ } ++ goto done; ++ } ++ ++ if (hw->rx) { ++ int i; ++ u32 rx_data; ++ for (i = 0; i < (hw->len - 1); i++) { ++ cns3xxx_spi_tx_rx(spi->chip_select, 0, 0xff, &rx_data); ++ hw->rx[i] = rx_data; ++ dev_dbg(&spi->dev, ++ "[SPI_CNS3XXX_DEBUG] hw->rx[%02d]: 0x%02x\n", i, ++ hw->rx[i]); ++ } ++ ++ if (t->last_in_message_list) { ++ cns3xxx_spi_tx_rx(spi->chip_select, 1, 0xff, &rx_data); ++ } else { ++ cns3xxx_spi_tx_rx(spi->chip_select, 0, 0xff, &rx_data); ++ } ++ hw->rx[i] = rx_data; ++ dev_dbg(&spi->dev, "[SPI_CNS3XXX_DEBUG] hw->rx[%02d]: 0x%02x\n", ++ i, hw->rx[i]); ++ } ++done: ++ return hw->len; ++} ++ ++static void __init cns3xxx_spi_initial(void) ++{ ++ u32 __iomem *gpiob = __io(CNS3XXX_MISC_BASE_VIRT + 0x0018); ++ u32 gpiob_pins = __raw_readl(gpiob); ++ ++ /* MMC/SD pins share with GPIOA */ ++ gpiob_pins |= 0xf80; ++ __raw_writel(gpiob_pins, gpiob); ++ ++ /* share pin config. */ ++ //PM_PLL_HM_PD_CTRL_REG &= ~(0x1 << 5); ++ //HAL_MISC_ENABLE_SPI_PINS(); ++ cns3xxx_pwr_clk_en(CNS3XXX_PWR_CLK_EN(SPI_PCM_I2C)); ++ cns3xxx_pwr_soft_rst(CNS3XXX_PWR_SOFTWARE_RST(SPI_PCM_I2C)); ++ ++ SPI_CONFIGURATION_REG = (((0x0 & 0x3) << 0) | /* 8bits shift length */ ++ (0x0 << 9) | /* SPI mode */ ++ (0x0 << 10) | /* disable FIFO */ ++ (0x1 << 11) | /* SPI master mode */ ++ (0x0 << 12) | /* disable SPI loopback mode */ ++ (0x1 << 13) | /* clock phase */ ++ (0x1 << 14) | /* clock polarity */ ++ (0x0 << 24) | /* disable - SPI data swap */ ++ (0x1 << 29) | /* enable - 2IO Read mode */ ++ (0x0 << 30) | /* disable - SPI high speed read for system boot up */ ++ (0x0 << 31)); /* disable - SPI */ ++ ++ /* Set SPI bit rate PCLK/2 */ ++ SPI_BIT_RATE_CONTROL_REG = 0x1; ++ ++ /* Set SPI Tx channel 0 */ ++ SPI_TRANSMIT_CONTROL_REG = 0x0; ++ ++ /* Set Tx FIFO Threshold, Tx FIFO has 2 words */ ++ SPI_FIFO_TRANSMIT_CONFIG_REG &= ~(0x03 << 4); ++ SPI_FIFO_TRANSMIT_CONFIG_REG |= ((0x0 & 0x03) << 4); ++ ++ /* Set Rx FIFO Threshold, Rx FIFO has 2 words */ ++ SPI_FIFO_RECEIVE_CONFIG_REG &= ~(0x03 << 4); ++ SPI_FIFO_RECEIVE_CONFIG_REG |= ((0x0 & 0x03) << 4); ++ ++ /* Disable all interrupt */ ++ SPI_INTERRUPT_ENABLE_REG = 0x0; ++ ++ /* Clear spurious interrupt sources */ ++ SPI_INTERRUPT_STATUS_REG = (0x0F << 4); ++ ++ /* Enable SPI */ ++ SPI_CONFIGURATION_REG |= (0x1 << 31); ++ ++ return; ++} ++ ++static int __init cns3xxx_spi_probe(struct platform_device *pdev) ++{ ++ struct spi_master *master; ++ struct cns3xxx_spi *hw; ++ int err = 0; ++ ++ printk("%s: setup CNS3XXX SPI Controller\n", __FUNCTION__); ++ ++ /* Allocate master with space for cns3xxx_spi */ ++ master = spi_alloc_master(&pdev->dev, sizeof(struct cns3xxx_spi)); ++ if (master == NULL) { ++ dev_err(&pdev->dev, "No memory for spi_master\n"); ++ err = -ENOMEM; ++ goto err_nomem; ++ } ++ ++ hw = spi_master_get_devdata(master); ++ memset(hw, 0, sizeof(struct cns3xxx_spi)); ++ ++ hw->master = spi_master_get(master); ++ hw->dev = &pdev->dev; ++ ++ platform_set_drvdata(pdev, hw); ++ init_completion(&hw->done); ++ ++ /* setup the master state. */ ++ ++ master->num_chipselect = 4; ++ master->bus_num = 1; ++ ++ /* setup the state for the bitbang driver */ ++ ++ hw->bitbang.master = hw->master; ++ hw->bitbang.setup_transfer = cns3xxx_spi_setup_transfer; ++ hw->bitbang.chipselect = cns3xxx_spi_chipselect; ++ hw->bitbang.txrx_bufs = cns3xxx_spi_txrx; ++ hw->bitbang.master->setup = cns3xxx_spi_setup; ++ ++ dev_dbg(hw->dev, "bitbang at %p\n", &hw->bitbang); ++ ++ /* SPI controller initializations */ ++ cns3xxx_spi_initial(); ++ ++ /* register SPI controller */ ++ ++ err = spi_bitbang_start(&hw->bitbang); ++ if (err) { ++ dev_err(&pdev->dev, "Failed to register SPI master\n"); ++ goto err_register; ++ } ++ ++ return 0; ++ ++err_register: ++ spi_master_put(hw->master);; ++ ++err_nomem: ++ return err; ++} ++ ++static int __devexit cns3xxx_spi_remove(struct platform_device *dev) ++{ ++ struct cns3xxx_spi *hw = platform_get_drvdata(dev); ++ ++ platform_set_drvdata(dev, NULL); ++ ++ spi_unregister_master(hw->master); ++ ++ spi_master_put(hw->master); ++ return 0; ++} ++ ++#ifdef CONFIG_PM ++ ++static int cns3xxx_spi_suspend(struct platform_device *pdev, pm_message_t msg) ++{ ++ struct cns3xxx_spi *hw = platform_get_drvdata(pdev); ++ ++ return 0; ++} ++ ++static int cns3xxx_spi_resume(struct platform_device *pdev) ++{ ++ struct cns3xxx_spi *hw = platform_get_drvdata(pdev); ++ ++ return 0; ++} ++ ++#else ++#define cns3xxx_spi_suspend NULL ++#define cns3xxx_spi_resume NULL ++#endif ++ ++static struct platform_driver cns3xxx_spi_driver = { ++ .probe = cns3xxx_spi_probe, ++ .remove = __devexit_p(cns3xxx_spi_remove), ++ .suspend = cns3xxx_spi_suspend, ++ .resume = cns3xxx_spi_resume, ++ .driver = { ++ .name = "cns3xxx_spi", ++ .owner = THIS_MODULE, ++ }, ++}; ++ ++static int __init cns3xxx_spi_init(void) ++{ ++ return platform_driver_register(&cns3xxx_spi_driver); ++} ++ ++static void __exit cns3xxx_spi_exit(void) ++{ ++ platform_driver_unregister(&cns3xxx_spi_driver); ++} ++ ++module_init(cns3xxx_spi_init); ++module_exit(cns3xxx_spi_exit); ++ ++MODULE_AUTHOR("Cavium Networks"); ++MODULE_DESCRIPTION("CNS3XXX SPI Controller Driver"); ++MODULE_LICENSE("GPL"); ++MODULE_ALIAS("platform:cns3xxx_spi"); ++ ++EXPORT_SYMBOL_GPL(cns3xxx_spi_tx_rx); +--- a/include/linux/spi/spi.h ++++ b/include/linux/spi/spi.h +@@ -446,6 +446,13 @@ struct spi_transfer { + u32 speed_hz; + + struct list_head transfer_list; ++ ++#ifdef CONFIG_ARCH_CNS3XXX ++ unsigned last_in_message_list; ++#ifdef CONFIG_SPI_CNS3XXX_2IOREAD ++ u8 dio_read; ++#endif ++#endif + }; + + /** +--- a/drivers/spi/spi_bitbang.c ++++ b/drivers/spi/spi_bitbang.c +@@ -329,6 +329,12 @@ static void bitbang_work(struct work_str + */ + if (!m->is_dma_mapped) + t->rx_dma = t->tx_dma = 0; ++ ++ if (t->transfer_list.next == &m->transfers) ++ t->last_in_message_list = 1; ++ else ++ t->last_in_message_list = 0; ++ + status = bitbang->txrx_bufs(spi, t); + } + if (status > 0) |