diff options
Diffstat (limited to 'c/src/lib/libbsp/arm/lm3s69xx/ssi/ssi.c')
| -rw-r--r-- | c/src/lib/libbsp/arm/lm3s69xx/ssi/ssi.c | 170 |
1 files changed, 0 insertions, 170 deletions
diff --git a/c/src/lib/libbsp/arm/lm3s69xx/ssi/ssi.c b/c/src/lib/libbsp/arm/lm3s69xx/ssi/ssi.c deleted file mode 100644 index 9469c611f0..0000000000 --- a/c/src/lib/libbsp/arm/lm3s69xx/ssi/ssi.c +++ /dev/null @@ -1,170 +0,0 @@ -/* - * Copyright © 2013 Eugeniy Meshcheryakov <eugen@debian.org> - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.org/license/LICENSE. - */ - -#include <bsp.h> -#include <bspopts.h> -#include <bsp/ssi.h> -#include <bsp/syscon.h> -#include <bsp/io.h> -#include <bsp/lm3s69xx.h> - -typedef struct { - rtems_libi2c_bus_t bus; - volatile lm3s69xx_ssi *regs; - int bus_number; - uint16_t idle_char; - uint8_t cs_pin; - lm3s69xx_gpio_config io_configs[3]; -} lm3s69xx_ssi_bus_entry; - -static rtems_status_code lm3s69xx_ssi_init(rtems_libi2c_bus_t *bus) -{ - lm3s69xx_ssi_bus_entry *e = (lm3s69xx_ssi_bus_entry *)bus; - volatile lm3s69xx_ssi* regs = e->regs; - uint32_t clock_div = LM3S69XX_SYSTEM_CLOCK / 2 / LM3S69XX_SSI_CLOCK; - - lm3s69xx_gpio_set_config_array(e->io_configs, 3); - - lm3s69xx_syscon_enable_ssi_clock(e->bus_number, true); - regs->cr1 = 0; - regs->cpsr = SSI_CPSRDIV(2); - regs->cr0 = SSICR0_SCR(clock_div - 1) | SSICR0_SPO | SSICR0_SPH | SSICR0_FRF(0) | SSICR0_DSS(7); - regs->cr1 = SSICR1_SSE; - - return RTEMS_SUCCESSFUL; -} - -static rtems_status_code lm3s69xx_ssi_send_start(rtems_libi2c_bus_t *bus) -{ - return RTEMS_SUCCESSFUL; -} - -static rtems_status_code lm3s69xx_ssi_send_stop(rtems_libi2c_bus_t *bus) -{ - lm3s69xx_ssi_bus_entry *e = (lm3s69xx_ssi_bus_entry *)bus; - volatile lm3s69xx_ssi* regs = e->regs; - - while ((regs->sr & SSISR_BSY) != 0) - /* wait */; - - lm3s69xx_gpio_set_pin(e->cs_pin, true); - - return RTEMS_SUCCESSFUL; -} - -static rtems_status_code lm3s69xx_ssi_send_addr(rtems_libi2c_bus_t *bus, - uint32_t addr, int rw) -{ - lm3s69xx_ssi_bus_entry *e = (lm3s69xx_ssi_bus_entry *)bus; - e->cs_pin = addr; - lm3s69xx_gpio_set_pin(e->cs_pin, false); - - return RTEMS_SUCCESSFUL; -} - -static int lm3s69xx_ssi_read(rtems_libi2c_bus_t *bus, unsigned char *in, int n) -{ - lm3s69xx_ssi_bus_entry *e = (lm3s69xx_ssi_bus_entry *)bus; - volatile lm3s69xx_ssi* regs = e->regs; - int i; - - for (i = 0; i < n; i++) { - while ((regs->sr & SSISR_TNF) == 0) - /* wait */; - - regs->dr = e->idle_char; - - while ((regs->sr & SSISR_RNE) == 0) - /* wait */; - - in[i] = regs->dr & 0xff; - } - - return n; -} - -static int lm3s69xx_ssi_write(rtems_libi2c_bus_t *bus, unsigned char *out, int n) -{ - lm3s69xx_ssi_bus_entry *e = (lm3s69xx_ssi_bus_entry *)bus; - volatile lm3s69xx_ssi* regs = e->regs; - int i; - - for (i = 0; i < n; i++) { - while ((regs->sr & SSISR_TNF) == 0) - /* wait */; - - regs->dr = out[i]; - - while ((regs->sr & SSISR_RNE) == 0) - /* wait */; - - uint32_t dummy = regs->dr; - (void)dummy; - } - - return n; -} - -static int lm3s69xx_ssi_ioctl(rtems_libi2c_bus_t *bus, int cmd, void *arg) -{ - return -RTEMS_NOT_DEFINED; -} - -static const rtems_libi2c_bus_ops_t lm3s69xx_ssi_ops = { - .init = lm3s69xx_ssi_init, - .send_start = lm3s69xx_ssi_send_start, - .send_stop = lm3s69xx_ssi_send_stop, - .send_addr = lm3s69xx_ssi_send_addr, - .read_bytes = lm3s69xx_ssi_read, - .write_bytes = lm3s69xx_ssi_write, - .ioctl = lm3s69xx_ssi_ioctl -}; - -static lm3s69xx_ssi_bus_entry ssi_0_bus = { - .bus = { - .ops = &lm3s69xx_ssi_ops, - .size = sizeof(lm3s69xx_ssi_bus_entry) - }, - .regs = (volatile lm3s69xx_ssi *)LM3S69XX_SSI_0_BASE, - .bus_number = 0, - .idle_char = 0xffff, - .io_configs = { -#if defined(LM3S69XX_MCU_LM3S3749) || defined(LM3S69XX_MCU_LM3S6965) || defined(LM3S69XX_MCU_LM4F120) - LM3S69XX_PIN_SSI_TX(LM3S69XX_PORT_A, 2), /* CLK */ - LM3S69XX_PIN_SSI_TX(LM3S69XX_PORT_A, 5), /* TX */ - LM3S69XX_PIN_SSI_RX(LM3S69XX_PORT_A, 4) /* RX */ -#else -#error No GPIO pin definitions for SSI 0 -#endif - } -}; - -rtems_libi2c_bus_t * const lm3s69xx_ssi_0 = &ssi_0_bus.bus; - -#if LM3S69XX_NUM_SSI_BLOCKS > 1 -static lm3s69xx_ssi_bus_entry ssi_1_bus = { - .bus = { - .ops = &lm3s69xx_ssi_ops, - .size = sizeof(lm3s69xx_ssi_bus_entry) - }, - .regs = (volatile lm3s69xx_ssi *)LM3S69XX_SSI_1_BASE, - .bus_number = 1, - .idle_char = 0xffff, - .io_configs = { -#if defined(LM3S69XX_MCU_LM3S3749) || defined(LM3S69XX_MCU_LM4F120) - LM3S69XX_PIN_SSI_TX(LM3S69XX_PORT_E, 0), /* CLK */ - LM3S69XX_PIN_SSI_TX(LM3S69XX_PORT_E, 3), /* TX */ - LM3S69XX_PIN_SSI_RX(LM3S69XX_PORT_E, 2) /* RX */ -#else -#error No GPIO pin definitions for SSI 1 -#endif - } -}; - -rtems_libi2c_bus_t * const lm3s69xx_ssi_1 = &ssi_1_bus.bus; -#endif /* LM3S69XX_NUM_SSI_BLOCKS > 1 */ |