1 /* uart_xlnx_ps.c - Xilinx Zynq family serial driver */
6  * SPDX-License-Identifier: Apache-2.0
19  * - the following macro for the number of bytes between register addresses:
42  * Comp. Xilinx Zynq-7000 Technical Reference Manual (ug585), chap. B.33
65 #define XUARTPS_CR_STOPBRK	0x00000100U  /**< Stop transmission of break */
66 #define XUARTPS_CR_STARTBRK	0x00000080U  /**< Set break */
104 #define XUARTPS_IXR_RBRK	0x00002000U /**< Rx FIFO break detect interrupt */
176  * of the UART are modified at run-time.
200  * of the UART are being modified at run-time.
222  * registers is described in the Zynq-7000 TRM, chapter 19.2.3 'Baud Rate
230 	const struct uart_xlnx_ps_dev_config *dev_cfg = dev->config;  in set_baudrate()
231 	uint32_t baud = dev_cfg->baud_rate;  in set_baudrate()
232 	uint32_t clk_freq = dev_cfg->sys_clk_freq;  in set_baudrate()
253 				bauderr = baud - tmpbaud;  in set_baudrate()
255 				bauderr = tmpbaud - baud;  in set_baudrate()
258 				break;  in set_baudrate()
264 		 * -> This function is always called from a context in which  in set_baudrate()
284 	const struct uart_xlnx_ps_dev_config *dev_cfg = dev->config;  in uart_xlnx_ps_init()
297 	err = pinctrl_apply_state(dev_cfg->pincfg, PINCTRL_STATE_DEFAULT);  in uart_xlnx_ps_init()
318 	set_baudrate(dev, dev_cfg->baud_rate);  in uart_xlnx_ps_init()
326 	dev_cfg->irq_config_func(dev);  in uart_xlnx_ps_init()
341  * @return 0 if a character arrived, -1 if the input buffer if empty.
352 		return -1;  in uart_xlnx_ps_poll_in()
424 		break;  in uart_xlnx_ps_cfg2ll_parity()
427 		break;  in uart_xlnx_ps_cfg2ll_parity()
430 		break;  in uart_xlnx_ps_cfg2ll_parity()
433 		break;  in uart_xlnx_ps_cfg2ll_parity()
436 		break;  in uart_xlnx_ps_cfg2ll_parity()
480 		break;  in uart_xlnx_ps_cfg2ll_stopbits()
483 		break;  in uart_xlnx_ps_cfg2ll_stopbits()
486 		break;  in uart_xlnx_ps_cfg2ll_stopbits()
530 		break;  in uart_xlnx_ps_cfg2ll_databits()
533 		break;  in uart_xlnx_ps_cfg2ll_databits()
536 		break;  in uart_xlnx_ps_cfg2ll_databits()
587  * @brief Configures the UART device at run-time.
589  * Configures the UART device at run-time according to the
602 	(struct uart_xlnx_ps_dev_config *)dev->config;  in uart_xlnx_ps_configure()
612 	/* Mask out all items that might be re-configured */  in uart_xlnx_ps_configure()
619 	if ((!uart_xlnx_ps_cfg2ll_parity(&mode_reg, cfg->parity)) ||  in uart_xlnx_ps_configure()
620 		(!uart_xlnx_ps_cfg2ll_stopbits(&mode_reg, cfg->stop_bits)) ||  in uart_xlnx_ps_configure()
621 		(!uart_xlnx_ps_cfg2ll_databits(&mode_reg, cfg->data_bits)) ||  in uart_xlnx_ps_configure()
622 		(!uart_xlnx_ps_cfg2ll_hwctrl(&modemcr_reg, cfg->flow_ctrl))) {  in uart_xlnx_ps_configure()
623 		return -ENOTSUP;  in uart_xlnx_ps_configure()
626 	/* Disable the controller before modifying any config registers */  in uart_xlnx_ps_configure()
630 	set_baudrate(dev, cfg->baudrate);  in uart_xlnx_ps_configure()
631 	dev_cfg->baud_rate = cfg->baudrate;  in uart_xlnx_ps_configure()
637 	/* Re-enable the controller */  in uart_xlnx_ps_configure()
664 	 *  000b : even -> reset value  in uart_xlnx_ps_ll2cfg_parity()
706 	 *  00b : 1 stop bit -> reset value  in uart_xlnx_ps_ll2cfg_stopbits()
743 	 *  0xb : 8 data bits -> reset value  in uart_xlnx_ps_ll2cfg_databits()
779 	 *  0b : no flow control -> reset value  in uart_xlnx_ps_ll2cfg_hwctrl()
793  * @brief Returns the current configuration of the UART at run-time.
795  * Returns the current configuration of the UART at run-time by obtaining
808 	const struct uart_xlnx_ps_dev_config *dev_cfg = dev->config;  in uart_xlnx_ps_config_get()
812 	 * Read the Mode & Modem control registers - they contain  in uart_xlnx_ps_config_get()
820 	cfg->baudrate  = dev_cfg->baud_rate;  in uart_xlnx_ps_config_get()
821 	cfg->parity    = uart_xlnx_ps_ll2cfg_parity(mode_reg);  in uart_xlnx_ps_config_get()
822 	cfg->stop_bits = uart_xlnx_ps_ll2cfg_stopbits(mode_reg);  in uart_xlnx_ps_config_get()
823 	cfg->data_bits = uart_xlnx_ps_ll2cfg_databits(mode_reg);  in uart_xlnx_ps_config_get()
824 	cfg->flow_ctrl = uart_xlnx_ps_ll2cfg_hwctrl(modemcr_reg);  in uart_xlnx_ps_config_get()
849 	while (size--) {  in uart_xlnx_ps_fifo_fill()
1076 	struct uart_xlnx_ps_dev_data_t *dev_data = dev->data;  in uart_xlnx_ps_irq_callback_set()
1078 	dev_data->user_cb = cb;  in uart_xlnx_ps_irq_callback_set()
1079 	dev_data->user_data = cb_data;  in uart_xlnx_ps_irq_callback_set()
1083  * @brief Interrupt ce routine.
1091 	const struct uart_xlnx_ps_dev_data_t *data = dev->data;  in uart_xlnx_ps_isr()
1093 	if (data->user_cb) {  in uart_xlnx_ps_isr()
1094 		data->user_cb(dev, data->user_data);  in uart_xlnx_ps_isr()