2 * Copyright © 2012 Keith Packard <keithp@keithp.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
18 #ifndef _AO_ARCH_FUNCS_H_
19 #define _AO_ARCH_FUNCS_H_
24 /* PCLK is set to 16MHz (HCLK 32MHz, APB prescaler 2) */
26 #define AO_SPI_SPEED_8MHz STM_SPI_CR1_BR_PCLK_2
27 #define AO_SPI_SPEED_4MHz STM_SPI_CR1_BR_PCLK_4
28 #define AO_SPI_SPEED_2MHz STM_SPI_CR1_BR_PCLK_8
29 #define AO_SPI_SPEED_1MHz STM_SPI_CR1_BR_PCLK_16
30 #define AO_SPI_SPEED_500kHz STM_SPI_CR1_BR_PCLK_32
31 #define AO_SPI_SPEED_250kHz STM_SPI_CR1_BR_PCLK_64
32 #define AO_SPI_SPEED_125kHz STM_SPI_CR1_BR_PCLK_128
33 #define AO_SPI_SPEED_62500Hz STM_SPI_CR1_BR_PCLK_256
35 #define AO_SPI_SPEED_FAST AO_SPI_SPEED_8MHz
37 /* Companion bus wants something no faster than 200kHz */
39 #define AO_SPI_SPEED_200kHz AO_SPI_SPEED_125kHz
41 #define AO_SPI_CONFIG_1 0x00
42 #define AO_SPI_1_CONFIG_PA5_PA6_PA7 AO_SPI_CONFIG_1
43 #define AO_SPI_2_CONFIG_PB13_PB14_PB15 AO_SPI_CONFIG_1
45 #define AO_SPI_CONFIG_2 0x04
46 #define AO_SPI_1_CONFIG_PB3_PB4_PB5 AO_SPI_CONFIG_2
47 #define AO_SPI_2_CONFIG_PD1_PD3_PD4 AO_SPI_CONFIG_2
49 #define AO_SPI_CONFIG_3 0x08
50 #define AO_SPI_1_CONFIG_PE13_PE14_PE15 AO_SPI_CONFIG_3
52 #define AO_SPI_CONFIG_NONE 0x0c
54 #define AO_SPI_INDEX_MASK 0x01
55 #define AO_SPI_CONFIG_MASK 0x0c
57 #define AO_SPI_1_PA5_PA6_PA7 (STM_SPI_INDEX(1) | AO_SPI_1_CONFIG_PA5_PA6_PA7)
58 #define AO_SPI_1_PB3_PB4_PB5 (STM_SPI_INDEX(1) | AO_SPI_1_CONFIG_PB3_PB4_PB5)
59 #define AO_SPI_1_PE13_PE14_PE15 (STM_SPI_INDEX(1) | AO_SPI_1_CONFIG_PE13_PE14_PE15)
61 #define AO_SPI_2_PB13_PB14_PB15 (STM_SPI_INDEX(2) | AO_SPI_2_CONFIG_PB13_PB14_PB15)
62 #define AO_SPI_2_PD1_PD3_PD4 (STM_SPI_INDEX(2) | AO_SPI_2_CONFIG_PD1_PD3_PD4)
64 #define AO_SPI_INDEX(id) ((id) & AO_SPI_INDEX_MASK)
65 #define AO_SPI_CONFIG(id) ((id) & AO_SPI_CONFIG_MASK)
68 ao_spi_get(uint8_t spi_index, uint32_t speed);
71 ao_spi_put(uint8_t spi_index);
74 ao_spi_send(void *block, uint16_t len, uint8_t spi_index);
77 ao_spi_send_fixed(uint8_t value, uint16_t len, uint8_t spi_index);
80 ao_spi_recv(void *block, uint16_t len, uint8_t spi_index);
83 ao_spi_duplex(void *out, void *in, uint16_t len, uint8_t spi_index);
85 extern uint16_t ao_spi_speed[STM_NUM_SPI];
90 #define ao_spi_get_mask(reg,mask,bus, speed) do { \
91 ao_spi_get(bus, speed); \
92 (reg)->bsrr = ((uint32_t) mask) << 16; \
95 #define ao_spi_put_mask(reg,mask,bus) do { \
100 #define ao_spi_get_bit(reg,bit,pin,bus,speed) ao_spi_get_mask(reg,(1<<bit),bus,speed)
101 #define ao_spi_put_bit(reg,bit,pin,bus) ao_spi_put_mask(reg,(1<<bit),bus)
103 #define ao_enable_port(port) do { \
104 if ((port) == &stm_gpioa) \
105 stm_rcc.ahbenr |= (1 << STM_RCC_AHBENR_GPIOAEN); \
106 else if ((port) == &stm_gpiob) \
107 stm_rcc.ahbenr |= (1 << STM_RCC_AHBENR_GPIOBEN); \
108 else if ((port) == &stm_gpioc) \
109 stm_rcc.ahbenr |= (1 << STM_RCC_AHBENR_GPIOCEN); \
110 else if ((port) == &stm_gpiod) \
111 stm_rcc.ahbenr |= (1 << STM_RCC_AHBENR_GPIODEN); \
112 else if ((port) == &stm_gpioe) \
113 stm_rcc.ahbenr |= (1 << STM_RCC_AHBENR_GPIOEEN); \
117 #define ao_gpio_set(port, bit, pin, v) stm_gpio_set(port, bit, v)
119 #define ao_gpio_get(port, bit, pin) stm_gpio_get(port, bit)
121 #define ao_enable_output(port,bit,pin,v) do { \
122 ao_enable_port(port); \
123 ao_gpio_set(port, bit, pin, v); \
124 stm_moder_set(port, bit, STM_MODER_OUTPUT);\
127 #define ao_enable_input(port,bit,mode) do { \
128 ao_enable_port(port); \
129 stm_moder_set(port, bit, STM_MODER_INPUT); \
130 if (mode == AO_EXTI_MODE_PULL_UP) \
131 stm_pupdr_set(port, bit, STM_PUPDR_PULL_UP); \
132 else if (mode == AO_EXTI_MODE_PULL_DOWN) \
133 stm_pupdr_set(port, bit, STM_PUPDR_PULL_DOWN); \
135 stm_pupdr_set(port, bit, STM_PUPDR_NONE); \
138 #define ao_enable_cs(port,bit) do { \
139 stm_gpio_set((port), bit, 1); \
140 stm_moder_set((port), bit, STM_MODER_OUTPUT); \
143 #define ao_spi_init_cs(port, mask) do { \
144 ao_enable_port(port); \
145 if ((mask) & 0x0001) ao_enable_cs(port, 0); \
146 if ((mask) & 0x0002) ao_enable_cs(port, 1); \
147 if ((mask) & 0x0004) ao_enable_cs(port, 2); \
148 if ((mask) & 0x0008) ao_enable_cs(port, 3); \
149 if ((mask) & 0x0010) ao_enable_cs(port, 4); \
150 if ((mask) & 0x0020) ao_enable_cs(port, 5); \
151 if ((mask) & 0x0040) ao_enable_cs(port, 6); \
152 if ((mask) & 0x0080) ao_enable_cs(port, 7); \
153 if ((mask) & 0x0100) ao_enable_cs(port, 8); \
154 if ((mask) & 0x0200) ao_enable_cs(port, 9); \
155 if ((mask) & 0x0400) ao_enable_cs(port, 10);\
156 if ((mask) & 0x0800) ao_enable_cs(port, 11);\
157 if ((mask) & 0x1000) ao_enable_cs(port, 12);\
158 if ((mask) & 0x2000) ao_enable_cs(port, 13);\
159 if ((mask) & 0x4000) ao_enable_cs(port, 14);\
160 if ((mask) & 0x8000) ao_enable_cs(port, 15);\
166 extern uint8_t ao_dma_done[STM_NUM_DMA];
169 ao_dma_set_transfer(uint8_t index,
170 volatile void *peripheral,
176 ao_dma_set_isr(uint8_t index, void (*isr)(int index));
179 ao_dma_start(uint8_t index);
182 ao_dma_done_transfer(uint8_t index);
185 ao_dma_abort(uint8_t index);
188 ao_dma_alloc(uint8_t index);
196 ao_i2c_get(uint8_t i2c_index);
199 ao_i2c_start(uint8_t i2c_index, uint16_t address);
202 ao_i2c_put(uint8_t i2c_index);
205 ao_i2c_send(void *block, uint16_t len, uint8_t i2c_index, uint8_t stop);
208 ao_i2c_recv(void *block, uint16_t len, uint8_t i2c_index, uint8_t stop);
213 /* ao_serial_stm.c */
214 struct ao_stm_usart {
215 struct ao_fifo rx_fifo;
216 struct ao_fifo tx_fifo;
217 struct stm_usart *reg;
222 extern struct ao_stm_usart ao_stm_usart1;
226 extern struct ao_stm_usart ao_stm_usart2;
230 extern struct ao_stm_usart ao_stm_usart3;
233 #define ARM_PUSH32(stack, val) (*(--(stack)) = (val))
235 static inline uint32_t
236 ao_arch_irqsave(void) {
238 asm("mrs %0,primask" : "=&r" (primask));
239 ao_arch_block_interrupts();
244 ao_arch_irqrestore(uint32_t primask) {
245 asm("msr primask,%0" : : "r" (primask));
249 ao_arch_memory_barrier() {
250 asm volatile("" ::: "memory");
254 ao_arch_init_stack(struct ao_task *task, void *start)
256 uint32_t *sp = (uint32_t *) (task->stack + AO_STACK_SIZE);
257 uint32_t a = (uint32_t) start;
260 /* Return address (goes into LR) */
263 /* Clear register values r0-r12 */
271 /* PRIMASK with interrupts enabled */
277 static inline void ao_arch_save_regs(void) {
278 /* Save general registers */
279 asm("push {r0-r12,lr}\n");
286 asm("mrs r0,primask");
290 static inline void ao_arch_save_stack(void) {
292 asm("mov %0,sp" : "=&r" (sp) );
293 ao_cur_task->sp = (sp);
294 if ((uint8_t *) sp < &ao_cur_task->stack[0])
295 ao_panic (AO_PANIC_STACK);
298 static inline void ao_arch_restore_stack(void) {
300 sp = (uint32_t) ao_cur_task->sp;
303 asm("mov sp, %0" : : "r" (sp) );
305 /* Restore PRIMASK */
307 asm("msr primask,r0");
313 /* Restore general registers */
314 asm("pop {r0-r12,lr}\n");
316 /* Return to calling function */
320 #define ao_arch_isr_stack()
322 #define ao_arch_wait_interrupt() do { \
323 asm(".global ao_idle_loc\n\twfi\nao_idle_loc:"); \
324 ao_arch_release_interrupts(); \
325 ao_arch_block_interrupts(); \
328 #define ao_arch_critical(b) do { \
329 ao_arch_block_interrupts(); \
330 do { b } while (0); \
331 ao_arch_release_interrupts(); \
334 #endif /* _AO_ARCH_FUNCS_H_ */