294 lines
7.2 KiB
C
294 lines
7.2 KiB
C
/*
|
||
* File : drv_spi.c
|
||
* This file is part of RT-Thread RTOS
|
||
* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
|
||
*
|
||
* 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 program is distributed in the hope that it will be useful,
|
||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
* GNU General Public License for more details.
|
||
*
|
||
* You should have received a copy of the GNU General Public License along
|
||
* with this program; if not, write to the Free Software Foundation, Inc.,
|
||
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
||
*
|
||
* Change Logs:
|
||
* Date Author Notes
|
||
* 2017-11-02 ÇÚΪ±¾ first version
|
||
*/
|
||
|
||
#include <rtthread.h>
|
||
#include <drivers/spi.h>
|
||
#include "drv_spi.h"
|
||
#include "../libraries/ls1c_pin.h"
|
||
|
||
#ifdef RT_USING_SPI
|
||
|
||
//#define DEBUG
|
||
|
||
#ifdef DEBUG
|
||
#define DEBUG_PRINTF(...) rt_kprintf(__VA_ARGS__)
|
||
#else
|
||
#define DEBUG_PRINTF(...)
|
||
#endif
|
||
|
||
|
||
static rt_err_t configure(struct rt_spi_device *device, struct rt_spi_configuration *configuration);
|
||
static rt_uint32_t xfer(struct rt_spi_device *device, struct rt_spi_message *message);
|
||
|
||
|
||
static struct rt_spi_ops ls1c_spi_ops =
|
||
{
|
||
.configure = configure,
|
||
.xfer = xfer
|
||
};
|
||
|
||
|
||
static rt_err_t configure(struct rt_spi_device *device,
|
||
struct rt_spi_configuration *configuration)
|
||
{
|
||
struct rt_spi_bus *spi_bus = NULL;
|
||
struct ls1c_spi *ls1c_spi = NULL;
|
||
unsigned char SPIx = 0;
|
||
void *spi_base = NULL;
|
||
unsigned char cpol = 0;
|
||
unsigned char cpha = 0;
|
||
unsigned char val = 0;
|
||
|
||
RT_ASSERT(NULL != device);
|
||
RT_ASSERT(NULL != configuration);
|
||
|
||
spi_bus = device->bus;
|
||
ls1c_spi = (struct ls1c_spi *)spi_bus->parent.user_data;
|
||
SPIx = ls1c_spi->SPIx;
|
||
spi_base = ls1c_spi_get_base(SPIx);
|
||
|
||
{
|
||
// ʹÄÜSPI¿ØÖÆÆ÷£¬masterģʽ£¬¹Ø±ÕÖжÏ
|
||
reg_write_8(0x53, spi_base + LS1C_SPI_SPCR_OFFSET);
|
||
|
||
// Çå¿Õ״̬¼Ä´æÆ÷
|
||
reg_write_8(0xc0, spi_base + LS1C_SPI_SPSR_OFFSET);
|
||
|
||
// 1×Ö½Ú²úÉúÖжϣ¬²ÉÑù(¶Á)Óë·¢ËÍ(д)ʱ»úͬʱ
|
||
reg_write_8(0x03, spi_base + LS1C_SPI_SPER_OFFSET);
|
||
|
||
// ¹Ø±ÕSPI flash
|
||
val = reg_read_8(spi_base + LS1C_SPI_SFC_PARAM_OFFSET);
|
||
val &= 0xfe;
|
||
reg_write_8(val, spi_base + LS1C_SPI_SFC_PARAM_OFFSET);
|
||
|
||
// spi flashʱÐò¿ØÖƼĴæÆ÷
|
||
reg_write_8(0x05, spi_base + LS1C_SPI_SFC_TIMING_OFFSET);
|
||
}
|
||
|
||
// baudrate
|
||
ls1c_spi_set_clock(spi_base, configuration->max_hz);
|
||
|
||
// ÉèÖÃͨÐÅģʽ(ʱÖÓ¼«ÐÔºÍÏàλ)
|
||
if (configuration->mode & RT_SPI_CPOL) // cpol
|
||
{
|
||
cpol = SPI_CPOL_1;
|
||
}
|
||
else
|
||
{
|
||
cpol = SPI_CPOL_0;
|
||
}
|
||
if (configuration->mode & RT_SPI_CPHA) // cpha
|
||
{
|
||
cpha = SPI_CPHA_1;
|
||
}
|
||
else
|
||
{
|
||
cpha = SPI_CPHA_0;
|
||
}
|
||
ls1c_spi_set_mode(spi_base, cpol, cpha);
|
||
|
||
DEBUG_PRINTF("ls1c spi%d configuration\n", SPIx);
|
||
|
||
return RT_EOK;
|
||
}
|
||
|
||
|
||
static rt_uint32_t xfer(struct rt_spi_device *device,
|
||
struct rt_spi_message *message)
|
||
{
|
||
struct rt_spi_bus *spi_bus = NULL;
|
||
struct ls1c_spi *ls1c_spi = NULL;
|
||
void *spi_base = NULL;
|
||
unsigned char SPIx = 0;
|
||
struct ls1c_spi_cs *ls1c_spi_cs = NULL;
|
||
unsigned char cs = 0;
|
||
rt_uint32_t size = 0;
|
||
const rt_uint8_t *send_ptr = NULL;
|
||
rt_uint8_t *recv_ptr = NULL;
|
||
rt_uint8_t data = 0;
|
||
|
||
RT_ASSERT(NULL != device);
|
||
RT_ASSERT(NULL != message);
|
||
|
||
spi_bus = device->bus;
|
||
ls1c_spi = spi_bus->parent.user_data;
|
||
SPIx = ls1c_spi->SPIx;
|
||
spi_base = ls1c_spi_get_base(SPIx);
|
||
ls1c_spi_cs = device->parent.user_data;
|
||
cs = ls1c_spi_cs->cs;
|
||
size = message->length;
|
||
|
||
DEBUG_PRINTF("[%s] SPIx=%d, cs=%d\n", __FUNCTION__, SPIx, cs);
|
||
|
||
// take cs
|
||
if (message->cs_take)
|
||
{
|
||
ls1c_spi_set_cs(spi_base, cs, 0);
|
||
}
|
||
|
||
// ÊÕ·¢Êý¾Ý
|
||
send_ptr = message->send_buf;
|
||
recv_ptr = message->recv_buf;
|
||
while (size--)
|
||
{
|
||
data = 0xFF;
|
||
if (NULL != send_ptr)
|
||
{
|
||
data = *send_ptr++;
|
||
}
|
||
|
||
if (NULL != recv_ptr)
|
||
{
|
||
*recv_ptr++ = ls1c_spi_txrx_byte(spi_base, data);
|
||
}
|
||
else
|
||
{
|
||
ls1c_spi_txrx_byte(spi_base, data);
|
||
}
|
||
}
|
||
|
||
// release cs
|
||
if (message->cs_release)
|
||
{
|
||
ls1c_spi_set_cs(spi_base, cs, 1);
|
||
}
|
||
|
||
return message->length;
|
||
}
|
||
|
||
|
||
#ifdef RT_USING_SPI0
|
||
struct ls1c_spi ls1c_spi0 =
|
||
{
|
||
.SPIx = LS1C_SPI_0,
|
||
};
|
||
|
||
static struct rt_spi_bus spi0_bus;
|
||
#endif
|
||
|
||
|
||
#ifdef RT_USING_SPI1
|
||
struct ls1c_spi ls1c_spi1 =
|
||
{
|
||
.SPIx = LS1C_SPI_1,
|
||
};
|
||
|
||
static struct rt_spi_bus spi1_bus;
|
||
#endif
|
||
|
||
|
||
/*
|
||
* ³õʼ»¯²¢×¢²áÁúо1cµÄspi×ÜÏß
|
||
* @SPI SPI×ÜÏߣ¬±ÈÈçLS1C_SPI_0£¬ LS1C_SPI_1
|
||
* @spi_bus_name ×ÜÏßÃû×Ö
|
||
* @ret
|
||
*/
|
||
rt_err_t ls1c_spi_bus_register(rt_uint8_t SPI, const char *spi_bus_name)
|
||
{
|
||
struct rt_spi_bus *spi_bus = NULL;
|
||
|
||
#ifdef RT_USING_SPI0
|
||
if (LS1C_SPI_0 == SPI)
|
||
{
|
||
spi_bus = &spi0_bus;
|
||
spi_bus->parent.user_data = &ls1c_spi0;
|
||
}
|
||
#endif
|
||
|
||
#ifdef RT_USING_SPI1
|
||
if (LS1C_SPI_1 == SPI)
|
||
{
|
||
spi_bus = &spi1_bus;
|
||
spi_bus->parent.user_data = &ls1c_spi1;
|
||
}
|
||
#endif
|
||
|
||
return rt_spi_bus_register(spi_bus, spi_bus_name, &ls1c_spi_ops);
|
||
}
|
||
|
||
int ls1c_hw_spi_init(void)
|
||
{
|
||
#ifdef RT_USING_SPI0
|
||
pin_set_purpose(78, PIN_PURPOSE_OTHER);
|
||
pin_set_purpose(79, PIN_PURPOSE_OTHER);
|
||
pin_set_purpose(80, PIN_PURPOSE_OTHER);
|
||
pin_set_purpose(83, PIN_PURPOSE_OTHER);//cs2 - SD card
|
||
pin_set_purpose(82, PIN_PURPOSE_OTHER);//cs1
|
||
|
||
pin_set_remap(78, PIN_REMAP_FOURTH);
|
||
pin_set_remap(79, PIN_REMAP_FOURTH);
|
||
pin_set_remap(80, PIN_REMAP_FOURTH);
|
||
pin_set_remap(83, PIN_REMAP_FOURTH);//cs2 - SD card
|
||
pin_set_remap(82, PIN_REMAP_FOURTH);//cs1
|
||
ls1c_spi_bus_register(LS1C_SPI_0,"spi0");
|
||
#endif
|
||
|
||
#ifdef RT_USING_SPI1
|
||
pin_set_purpose(46, PIN_PURPOSE_OTHER);
|
||
pin_set_purpose(47, PIN_PURPOSE_OTHER);
|
||
pin_set_purpose(48, PIN_PURPOSE_OTHER);
|
||
pin_set_purpose(49, PIN_PURPOSE_OTHER);//CS0 - touch screen
|
||
pin_set_remap(46, PIN_REMAP_THIRD);
|
||
pin_set_remap(47, PIN_REMAP_THIRD);
|
||
pin_set_remap(48, PIN_REMAP_THIRD);
|
||
pin_set_remap(49, PIN_REMAP_THIRD);//CS0 - touch screen
|
||
ls1c_spi_bus_register(LS1C_SPI_1,"spi1");
|
||
|
||
#endif
|
||
|
||
|
||
#ifdef RT_USING_SPI0
|
||
/* attach cs */
|
||
{
|
||
static struct rt_spi_device spi_device1;
|
||
static struct rt_spi_device spi_device2;
|
||
static struct ls1c_spi_cs spi_cs1;
|
||
static struct ls1c_spi_cs spi_cs2;
|
||
|
||
/* spi02: CS2 SD Card*/
|
||
spi_cs2.cs = LS1C_SPI_CS_2;
|
||
rt_spi_bus_attach_device(&spi_device2, "spi02", "spi0", (void*)&spi_cs2);
|
||
spi_cs1.cs = LS1C_SPI_CS_1;
|
||
rt_spi_bus_attach_device(&spi_device1, "spi01", "spi0", (void*)&spi_cs1);
|
||
msd_init("sd0", "spi02");
|
||
}
|
||
#endif
|
||
#ifdef RT_USING_SPI1
|
||
{
|
||
static struct rt_spi_device spi_device;
|
||
static struct ls1c_spi_cs spi_cs;
|
||
|
||
/* spi10: CS0 Touch*/
|
||
spi_cs.cs = LS1C_SPI_CS_0;
|
||
rt_spi_bus_attach_device(&spi_device, "spi10", "spi1", (void*)&spi_cs);
|
||
}
|
||
#endif
|
||
}
|
||
|
||
INIT_BOARD_EXPORT(ls1c_hw_spi_init);
|
||
|
||
#endif
|
||
|