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wdenke85390d2002-04-01 14:29:03 +00001/*
2 * COM1 NS16550 support
Stefan Roese88fbf932010-04-15 16:07:28 +02003 * originally from linux source (arch/powerpc/boot/ns16550.c)
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +02004 * modified to use CONFIG_SYS_ISA_MEM and new defines
wdenke85390d2002-04-01 14:29:03 +00005 */
6
Simon Glasse98e01e2014-09-04 16:27:32 -06007#include <common.h>
Paul Burton8aadc562016-09-08 07:47:29 +01008#include <clk.h>
Simon Glass79a9da32014-09-04 16:27:34 -06009#include <dm.h>
10#include <errno.h>
wdenke85390d2002-04-01 14:29:03 +000011#include <ns16550.h>
Ley Foon Tana1763392018-06-14 18:45:22 +080012#include <reset.h>
Simon Glass79a9da32014-09-04 16:27:34 -060013#include <serial.h>
Ladislav Michlcc294422010-02-01 23:34:25 +010014#include <watchdog.h>
Graeme Russ14f06e62010-04-24 00:05:46 +100015#include <linux/types.h>
16#include <asm/io.h>
wdenke85390d2002-04-01 14:29:03 +000017
Simon Glass79a9da32014-09-04 16:27:34 -060018DECLARE_GLOBAL_DATA_PTR;
19
Detlev Zundel166fb542009-04-03 11:53:01 +020020#define UART_LCRVAL UART_LCR_8N1 /* 8 data, 1 stop, no parity */
21#define UART_MCRVAL (UART_MCR_DTR | \
22 UART_MCR_RTS) /* RTS/DTR */
Simon Glass79a9da32014-09-04 16:27:34 -060023
24#ifndef CONFIG_DM_SERIAL
Graeme Russ14f06e62010-04-24 00:05:46 +100025#ifdef CONFIG_SYS_NS16550_PORT_MAPPED
Simon Glassdd5497c2011-10-15 19:14:09 +000026#define serial_out(x, y) outb(x, (ulong)y)
27#define serial_in(y) inb((ulong)y)
Dave Aldridgea51bebc2011-09-01 22:47:14 +000028#elif defined(CONFIG_SYS_NS16550_MEM32) && (CONFIG_SYS_NS16550_REG_SIZE > 0)
Simon Glassdd5497c2011-10-15 19:14:09 +000029#define serial_out(x, y) out_be32(y, x)
30#define serial_in(y) in_be32(y)
Dave Aldridgea51bebc2011-09-01 22:47:14 +000031#elif defined(CONFIG_SYS_NS16550_MEM32) && (CONFIG_SYS_NS16550_REG_SIZE < 0)
Simon Glassdd5497c2011-10-15 19:14:09 +000032#define serial_out(x, y) out_le32(y, x)
33#define serial_in(y) in_le32(y)
Graeme Russ14f06e62010-04-24 00:05:46 +100034#else
Simon Glassdd5497c2011-10-15 19:14:09 +000035#define serial_out(x, y) writeb(x, y)
36#define serial_in(y) readb(y)
Graeme Russ14f06e62010-04-24 00:05:46 +100037#endif
Simon Glass79a9da32014-09-04 16:27:34 -060038#endif /* !CONFIG_DM_SERIAL */
wdenke85390d2002-04-01 14:29:03 +000039
Khoronzhuk, Ivan80902982014-07-16 00:59:25 +030040#if defined(CONFIG_SOC_KEYSTONE)
Vitaly Andrianov7bcf4d62014-04-04 13:16:53 -040041#define UART_REG_VAL_PWREMU_MGMT_UART_DISABLE 0
42#define UART_REG_VAL_PWREMU_MGMT_UART_ENABLE ((1 << 14) | (1 << 13) | (1 << 0))
Karicheri, Muralidharancbc08882014-04-09 15:38:46 -040043#undef UART_MCRVAL
44#ifdef CONFIG_SERIAL_HW_FLOW_CONTROL
45#define UART_MCRVAL (UART_MCR_RTS | UART_MCR_AFE)
46#else
47#define UART_MCRVAL (UART_MCR_RTS)
48#endif
Vitaly Andrianov7bcf4d62014-04-04 13:16:53 -040049#endif
50
Prafulla Wadaskar66216372010-10-27 21:58:31 +053051#ifndef CONFIG_SYS_NS16550_IER
52#define CONFIG_SYS_NS16550_IER 0x00
53#endif /* CONFIG_SYS_NS16550_IER */
54
Simon Glassb31fb122015-02-27 22:06:26 -070055static inline void serial_out_shift(void *addr, int shift, int value)
Simon Glass6aba4fd2015-01-26 18:27:08 -070056{
Simon Glass79a9da32014-09-04 16:27:34 -060057#ifdef CONFIG_SYS_NS16550_PORT_MAPPED
Simon Glass96e230b2014-10-10 07:49:13 -060058 outb(value, (ulong)addr);
Bernhard Messerklingerd8427e72018-02-15 09:02:26 +010059#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_LITTLE_ENDIAN)
Simon Glass79a9da32014-09-04 16:27:34 -060060 out_le32(addr, value);
61#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_BIG_ENDIAN)
62 out_be32(addr, value);
Simon Glass0b31ec72015-05-12 14:55:02 -060063#elif defined(CONFIG_SYS_NS16550_MEM32)
64 writel(value, addr);
Simon Glass79a9da32014-09-04 16:27:34 -060065#elif defined(CONFIG_SYS_BIG_ENDIAN)
Simon Glass6aba4fd2015-01-26 18:27:08 -070066 writeb(value, addr + (1 << shift) - 1);
Simon Glass79a9da32014-09-04 16:27:34 -060067#else
68 writeb(value, addr);
69#endif
70}
71
Simon Glassb31fb122015-02-27 22:06:26 -070072static inline int serial_in_shift(void *addr, int shift)
Simon Glass79a9da32014-09-04 16:27:34 -060073{
Simon Glass79a9da32014-09-04 16:27:34 -060074#ifdef CONFIG_SYS_NS16550_PORT_MAPPED
Simon Glass96e230b2014-10-10 07:49:13 -060075 return inb((ulong)addr);
Bernhard Messerklingerd8427e72018-02-15 09:02:26 +010076#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_LITTLE_ENDIAN)
Simon Glass79a9da32014-09-04 16:27:34 -060077 return in_le32(addr);
78#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_BIG_ENDIAN)
79 return in_be32(addr);
Simon Glass0b31ec72015-05-12 14:55:02 -060080#elif defined(CONFIG_SYS_NS16550_MEM32)
81 return readl(addr);
Simon Glass79a9da32014-09-04 16:27:34 -060082#elif defined(CONFIG_SYS_BIG_ENDIAN)
Axel Linb5c372d2015-02-28 15:55:36 +080083 return readb(addr + (1 << shift) - 1);
Simon Glass79a9da32014-09-04 16:27:34 -060084#else
85 return readb(addr);
86#endif
87}
88
Marek Vasut3e97cbb2016-05-25 02:13:03 +020089#ifdef CONFIG_DM_SERIAL
90
91#ifndef CONFIG_SYS_NS16550_CLK
92#define CONFIG_SYS_NS16550_CLK 0
93#endif
94
Simon Glass6aba4fd2015-01-26 18:27:08 -070095static void ns16550_writeb(NS16550_t port, int offset, int value)
96{
97 struct ns16550_platdata *plat = port->plat;
98 unsigned char *addr;
99
100 offset *= 1 << plat->reg_shift;
Paul Burtonc8acc892016-05-17 07:43:26 +0100101 addr = (unsigned char *)plat->base + offset;
102
Simon Glass6aba4fd2015-01-26 18:27:08 -0700103 /*
104 * As far as we know it doesn't make sense to support selection of
105 * these options at run-time, so use the existing CONFIG options.
106 */
Michal Simek7e0cdc42016-02-16 16:17:49 +0100107 serial_out_shift(addr + plat->reg_offset, plat->reg_shift, value);
Simon Glass6aba4fd2015-01-26 18:27:08 -0700108}
109
110static int ns16550_readb(NS16550_t port, int offset)
111{
112 struct ns16550_platdata *plat = port->plat;
113 unsigned char *addr;
114
115 offset *= 1 << plat->reg_shift;
Paul Burtonc8acc892016-05-17 07:43:26 +0100116 addr = (unsigned char *)plat->base + offset;
Simon Glass6aba4fd2015-01-26 18:27:08 -0700117
Michal Simek7e0cdc42016-02-16 16:17:49 +0100118 return serial_in_shift(addr + plat->reg_offset, plat->reg_shift);
Simon Glass6aba4fd2015-01-26 18:27:08 -0700119}
120
Marek Vasutf523c9c2016-12-01 02:06:29 +0100121static u32 ns16550_getfcr(NS16550_t port)
122{
123 struct ns16550_platdata *plat = port->plat;
124
125 return plat->fcr;
126}
127
Simon Glass79a9da32014-09-04 16:27:34 -0600128/* We can clean these up once everything is moved to driver model */
129#define serial_out(value, addr) \
Simon Glassb31fb122015-02-27 22:06:26 -0700130 ns16550_writeb(com_port, \
131 (unsigned char *)addr - (unsigned char *)com_port, value)
Simon Glass79a9da32014-09-04 16:27:34 -0600132#define serial_in(addr) \
Simon Glassb31fb122015-02-27 22:06:26 -0700133 ns16550_readb(com_port, \
134 (unsigned char *)addr - (unsigned char *)com_port)
Marek Vasutf523c9c2016-12-01 02:06:29 +0100135#else
136static u32 ns16550_getfcr(NS16550_t port)
137{
Heiko Schocher06f108e2017-01-18 08:05:49 +0100138 return UART_FCR_DEFVAL;
Marek Vasutf523c9c2016-12-01 02:06:29 +0100139}
Simon Glass79a9da32014-09-04 16:27:34 -0600140#endif
141
Marek Vasut3b164a52016-05-25 02:13:16 +0200142int ns16550_calc_divisor(NS16550_t port, int clock, int baudrate)
Simon Glasse98e01e2014-09-04 16:27:32 -0600143{
144 const unsigned int mode_x_div = 16;
145
Simon Glass27afb522015-01-26 18:27:09 -0700146 return DIV_ROUND_CLOSEST(clock, mode_x_div * baudrate);
147}
148
Simon Glassc31ebfe2014-09-04 16:27:33 -0600149static void NS16550_setbrg(NS16550_t com_port, int baud_divisor)
150{
151 serial_out(UART_LCR_BKSE | UART_LCRVAL, &com_port->lcr);
152 serial_out(baud_divisor & 0xff, &com_port->dll);
153 serial_out((baud_divisor >> 8) & 0xff, &com_port->dlm);
154 serial_out(UART_LCRVAL, &com_port->lcr);
155}
156
Simon Glassdd5497c2011-10-15 19:14:09 +0000157void NS16550_init(NS16550_t com_port, int baud_divisor)
wdenke85390d2002-04-01 14:29:03 +0000158{
Gregoire Gentil6b05d0a2014-11-10 11:04:10 -0800159#if (defined(CONFIG_SPL_BUILD) && \
160 (defined(CONFIG_OMAP34XX) || defined(CONFIG_OMAP44XX)))
Manfred Huberf9b8ae32013-03-29 02:52:36 +0000161 /*
Gregoire Gentil6b05d0a2014-11-10 11:04:10 -0800162 * On some OMAP3/OMAP4 devices when UART3 is configured for boot mode
163 * before SPL starts only THRE bit is set. We have to empty the
164 * transmitter before initialization starts.
Manfred Huberf9b8ae32013-03-29 02:52:36 +0000165 */
166 if ((serial_in(&com_port->lsr) & (UART_LSR_TEMT | UART_LSR_THRE))
167 == UART_LSR_THRE) {
Simon Glass79a9da32014-09-04 16:27:34 -0600168 if (baud_divisor != -1)
169 NS16550_setbrg(com_port, baud_divisor);
Manfred Huberf9b8ae32013-03-29 02:52:36 +0000170 serial_out(0, &com_port->mdr1);
171 }
172#endif
173
Scott Wood6c6f0612012-09-18 18:19:05 -0500174 while (!(serial_in(&com_port->lsr) & UART_LSR_TEMT))
175 ;
176
Prafulla Wadaskar66216372010-10-27 21:58:31 +0530177 serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier);
Lokesh Vutla42cb4b82018-08-27 15:55:24 +0530178#if defined(CONFIG_ARCH_OMAP2PLUS) || defined(CONFIG_OMAP_SERIAL)
Graeme Russ14f06e62010-04-24 00:05:46 +1000179 serial_out(0x7, &com_port->mdr1); /* mode select reset TL16C750*/
wdenk21136db2003-07-16 21:53:01 +0000180#endif
Ley Foon Tana1763392018-06-14 18:45:22 +0800181
Graeme Russ14f06e62010-04-24 00:05:46 +1000182 serial_out(UART_MCRVAL, &com_port->mcr);
Marek Vasutf523c9c2016-12-01 02:06:29 +0100183 serial_out(ns16550_getfcr(com_port), &com_port->fcr);
Simon Glass79a9da32014-09-04 16:27:34 -0600184 if (baud_divisor != -1)
185 NS16550_setbrg(com_port, baud_divisor);
Lokesh Vutla42cb4b82018-08-27 15:55:24 +0530186#if defined(CONFIG_ARCH_OMAP2PLUS) || defined(CONFIG_SOC_DA8XX) || \
187 defined(CONFIG_OMAP_SERIAL)
Simon Glassdd5497c2011-10-15 19:14:09 +0000188 /* /16 is proper to hit 115200 with 48MHz */
189 serial_out(0, &com_port->mdr1);
Tom Rinif28c4342017-05-12 22:33:16 -0400190#endif
Khoronzhuk, Ivan80902982014-07-16 00:59:25 +0300191#if defined(CONFIG_SOC_KEYSTONE)
Vitaly Andrianov7bcf4d62014-04-04 13:16:53 -0400192 serial_out(UART_REG_VAL_PWREMU_MGMT_UART_ENABLE, &com_port->regC);
193#endif
wdenke85390d2002-04-01 14:29:03 +0000194}
195
Ron Madriddfa028a2009-02-18 14:30:44 -0800196#ifndef CONFIG_NS16550_MIN_FUNCTIONS
Simon Glassdd5497c2011-10-15 19:14:09 +0000197void NS16550_reinit(NS16550_t com_port, int baud_divisor)
wdenke85390d2002-04-01 14:29:03 +0000198{
Prafulla Wadaskar66216372010-10-27 21:58:31 +0530199 serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier);
Simon Glassc31ebfe2014-09-04 16:27:33 -0600200 NS16550_setbrg(com_port, 0);
Graeme Russ14f06e62010-04-24 00:05:46 +1000201 serial_out(UART_MCRVAL, &com_port->mcr);
Marek Vasutf523c9c2016-12-01 02:06:29 +0100202 serial_out(ns16550_getfcr(com_port), &com_port->fcr);
Simon Glassc31ebfe2014-09-04 16:27:33 -0600203 NS16550_setbrg(com_port, baud_divisor);
wdenke85390d2002-04-01 14:29:03 +0000204}
Ron Madriddfa028a2009-02-18 14:30:44 -0800205#endif /* CONFIG_NS16550_MIN_FUNCTIONS */
wdenke85390d2002-04-01 14:29:03 +0000206
Simon Glassdd5497c2011-10-15 19:14:09 +0000207void NS16550_putc(NS16550_t com_port, char c)
wdenke85390d2002-04-01 14:29:03 +0000208{
Simon Glassdd5497c2011-10-15 19:14:09 +0000209 while ((serial_in(&com_port->lsr) & UART_LSR_THRE) == 0)
210 ;
Graeme Russ14f06e62010-04-24 00:05:46 +1000211 serial_out(c, &com_port->thr);
Stefan Roese57b99882010-10-12 09:39:45 +0200212
213 /*
214 * Call watchdog_reset() upon newline. This is done here in putc
215 * since the environment code uses a single puts() to print the complete
216 * environment upon "printenv". So we can't put this watchdog call
217 * in puts().
218 */
219 if (c == '\n')
220 WATCHDOG_RESET();
wdenke85390d2002-04-01 14:29:03 +0000221}
222
Ron Madriddfa028a2009-02-18 14:30:44 -0800223#ifndef CONFIG_NS16550_MIN_FUNCTIONS
Simon Glassdd5497c2011-10-15 19:14:09 +0000224char NS16550_getc(NS16550_t com_port)
wdenke85390d2002-04-01 14:29:03 +0000225{
Graeme Russ14f06e62010-04-24 00:05:46 +1000226 while ((serial_in(&com_port->lsr) & UART_LSR_DR) == 0) {
Marek Vasut9e1fca92012-09-15 10:25:19 +0200227#if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_USB_TTY)
wdenk29e7f5a2004-03-12 00:14:09 +0000228 extern void usbtty_poll(void);
229 usbtty_poll();
230#endif
Ladislav Michlcc294422010-02-01 23:34:25 +0100231 WATCHDOG_RESET();
wdenk29e7f5a2004-03-12 00:14:09 +0000232 }
Graeme Russ14f06e62010-04-24 00:05:46 +1000233 return serial_in(&com_port->rbr);
wdenke85390d2002-04-01 14:29:03 +0000234}
235
Simon Glassdd5497c2011-10-15 19:14:09 +0000236int NS16550_tstc(NS16550_t com_port)
wdenke85390d2002-04-01 14:29:03 +0000237{
Simon Glassdd5497c2011-10-15 19:14:09 +0000238 return (serial_in(&com_port->lsr) & UART_LSR_DR) != 0;
wdenke85390d2002-04-01 14:29:03 +0000239}
240
Ron Madriddfa028a2009-02-18 14:30:44 -0800241#endif /* CONFIG_NS16550_MIN_FUNCTIONS */
Simon Glass79a9da32014-09-04 16:27:34 -0600242
Simon Glass27afb522015-01-26 18:27:09 -0700243#ifdef CONFIG_DEBUG_UART_NS16550
244
245#include <debug_uart.h>
246
Simon Glass60517d72015-10-18 19:51:23 -0600247static inline void _debug_uart_init(void)
Simon Glass27afb522015-01-26 18:27:09 -0700248{
249 struct NS16550 *com_port = (struct NS16550 *)CONFIG_DEBUG_UART_BASE;
250 int baud_divisor;
251
252 /*
253 * We copy the code from above because it is already horribly messy.
254 * Trying to refactor to nicely remove the duplication doesn't seem
255 * feasible. The better fix is to move all users of this driver to
256 * driver model.
257 */
Marek Vasut3b164a52016-05-25 02:13:16 +0200258 baud_divisor = ns16550_calc_divisor(com_port, CONFIG_DEBUG_UART_CLOCK,
259 CONFIG_BAUDRATE);
Simon Glass92465162015-06-23 15:39:06 -0600260 serial_dout(&com_port->ier, CONFIG_SYS_NS16550_IER);
Lokesh Vutla771d69c2017-04-22 15:57:25 +0530261 serial_dout(&com_port->mcr, UART_MCRVAL);
262 serial_dout(&com_port->fcr, UART_FCR_DEFVAL);
263
264 serial_dout(&com_port->lcr, UART_LCR_BKSE | UART_LCRVAL);
265 serial_dout(&com_port->dll, baud_divisor & 0xff);
266 serial_dout(&com_port->dlm, (baud_divisor >> 8) & 0xff);
267 serial_dout(&com_port->lcr, UART_LCRVAL);
268}
269
Simon Goldschmidte559cd62018-08-09 21:04:19 +0200270static inline int NS16550_read_baud_divisor(struct NS16550 *com_port)
271{
272 int ret;
273
274 serial_dout(&com_port->lcr, UART_LCR_BKSE | UART_LCRVAL);
275 ret = serial_din(&com_port->dll) & 0xff;
276 ret |= (serial_din(&com_port->dlm) & 0xff) << 8;
277 serial_dout(&com_port->lcr, UART_LCRVAL);
278
279 return ret;
280}
281
Lokesh Vutla771d69c2017-04-22 15:57:25 +0530282static inline void _debug_uart_putc(int ch)
283{
284 struct NS16550 *com_port = (struct NS16550 *)CONFIG_DEBUG_UART_BASE;
285
Simon Goldschmidte559cd62018-08-09 21:04:19 +0200286 while (!(serial_din(&com_port->lsr) & UART_LSR_THRE)) {
287 if (!NS16550_read_baud_divisor(com_port))
288 return;
289 }
Lokesh Vutla771d69c2017-04-22 15:57:25 +0530290 serial_dout(&com_port->thr, ch);
291}
292
293DEBUG_UART_FUNCS
294
295#endif
296
Simon Glass79a9da32014-09-04 16:27:34 -0600297#ifdef CONFIG_DM_SERIAL
298static int ns16550_serial_putc(struct udevice *dev, const char ch)
299{
300 struct NS16550 *const com_port = dev_get_priv(dev);
301
302 if (!(serial_in(&com_port->lsr) & UART_LSR_THRE))
303 return -EAGAIN;
304 serial_out(ch, &com_port->thr);
305
306 /*
307 * Call watchdog_reset() upon newline. This is done here in putc
308 * since the environment code uses a single puts() to print the complete
309 * environment upon "printenv". So we can't put this watchdog call
310 * in puts().
311 */
312 if (ch == '\n')
313 WATCHDOG_RESET();
314
315 return 0;
316}
317
318static int ns16550_serial_pending(struct udevice *dev, bool input)
319{
320 struct NS16550 *const com_port = dev_get_priv(dev);
321
322 if (input)
Mario Sixaed664a2018-01-15 11:09:49 +0100323 return (serial_in(&com_port->lsr) & UART_LSR_DR) ? 1 : 0;
Simon Glass79a9da32014-09-04 16:27:34 -0600324 else
Mario Sixaed664a2018-01-15 11:09:49 +0100325 return (serial_in(&com_port->lsr) & UART_LSR_THRE) ? 0 : 1;
Simon Glass79a9da32014-09-04 16:27:34 -0600326}
327
328static int ns16550_serial_getc(struct udevice *dev)
329{
Stefan Roese48b771c2017-08-16 17:37:15 +0200330 struct NS16550 *const com_port = dev_get_priv(dev);
331
332 if (!(serial_in(&com_port->lsr) & UART_LSR_DR))
Simon Glass79a9da32014-09-04 16:27:34 -0600333 return -EAGAIN;
334
Stefan Roese48b771c2017-08-16 17:37:15 +0200335 return serial_in(&com_port->rbr);
Simon Glass79a9da32014-09-04 16:27:34 -0600336}
337
338static int ns16550_serial_setbrg(struct udevice *dev, int baudrate)
339{
340 struct NS16550 *const com_port = dev_get_priv(dev);
341 struct ns16550_platdata *plat = com_port->plat;
342 int clock_divisor;
343
344 clock_divisor = ns16550_calc_divisor(com_port, plat->clock, baudrate);
345
346 NS16550_setbrg(com_port, clock_divisor);
347
348 return 0;
349}
350
351int ns16550_serial_probe(struct udevice *dev)
352{
353 struct NS16550 *const com_port = dev_get_priv(dev);
Ley Foon Tana1763392018-06-14 18:45:22 +0800354 struct reset_ctl_bulk reset_bulk;
355 int ret;
356
357 ret = reset_get_bulk(dev, &reset_bulk);
358 if (!ret)
359 reset_deassert_bulk(&reset_bulk);
Simon Glass79a9da32014-09-04 16:27:34 -0600360
Simon Glass3bf04f32014-10-22 21:37:05 -0600361 com_port->plat = dev_get_platdata(dev);
Simon Glass79a9da32014-09-04 16:27:34 -0600362 NS16550_init(com_port, -1);
363
364 return 0;
365}
366
Marek Vasut1a59eec2016-12-01 02:06:30 +0100367#if CONFIG_IS_ENABLED(OF_CONTROL)
368enum {
369 PORT_NS16550 = 0,
Marek Vasut92a744f2016-12-01 02:06:31 +0100370 PORT_JZ4780,
Marek Vasut1a59eec2016-12-01 02:06:30 +0100371};
372#endif
373
Simon Glass18798be2016-07-04 11:58:23 -0600374#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
Simon Glass79a9da32014-09-04 16:27:34 -0600375int ns16550_serial_ofdata_to_platdata(struct udevice *dev)
376{
Simon Glass79a9da32014-09-04 16:27:34 -0600377 struct ns16550_platdata *plat = dev->platdata;
Marek Vasut92a744f2016-12-01 02:06:31 +0100378 const u32 port_type = dev_get_driver_data(dev);
Simon Glass79a9da32014-09-04 16:27:34 -0600379 fdt_addr_t addr;
Masahiro Yamada09abe2b2016-09-26 20:45:27 +0900380 struct clk clk;
381 int err;
Simon Glass79a9da32014-09-04 16:27:34 -0600382
Bin Meng0203c1c2014-12-31 16:05:12 +0800383 /* try Processor Local Bus device first */
Simon Glass386dbfb2017-06-12 06:21:56 -0600384 addr = dev_read_addr(dev);
Simon Glassf1037ad2015-11-29 13:17:54 -0700385#if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI)
Bin Meng0203c1c2014-12-31 16:05:12 +0800386 if (addr == FDT_ADDR_T_NONE) {
387 /* then try pci device */
388 struct fdt_pci_addr pci_addr;
389 u32 bar;
390 int ret;
391
392 /* we prefer to use a memory-mapped register */
Simon Glassdd79d6e2017-01-17 16:52:55 -0700393 ret = fdtdec_get_pci_addr(gd->fdt_blob, dev_of_offset(dev),
Bin Meng0203c1c2014-12-31 16:05:12 +0800394 FDT_PCI_SPACE_MEM32, "reg",
395 &pci_addr);
396 if (ret) {
397 /* try if there is any i/o-mapped register */
398 ret = fdtdec_get_pci_addr(gd->fdt_blob,
Simon Glassdd79d6e2017-01-17 16:52:55 -0700399 dev_of_offset(dev),
Bin Meng0203c1c2014-12-31 16:05:12 +0800400 FDT_PCI_SPACE_IO,
401 "reg", &pci_addr);
402 if (ret)
403 return ret;
404 }
405
Simon Glassf1037ad2015-11-29 13:17:54 -0700406 ret = fdtdec_get_pci_bar32(dev, &pci_addr, &bar);
Bin Meng0203c1c2014-12-31 16:05:12 +0800407 if (ret)
408 return ret;
409
410 addr = bar;
411 }
412#endif
413
Simon Glass79a9da32014-09-04 16:27:34 -0600414 if (addr == FDT_ADDR_T_NONE)
415 return -EINVAL;
416
Paul Burtonc8acc892016-05-17 07:43:26 +0100417#ifdef CONFIG_SYS_NS16550_PORT_MAPPED
Simon Glass25463942014-10-22 21:37:04 -0600418 plat->base = addr;
Paul Burtonc8acc892016-05-17 07:43:26 +0100419#else
420 plat->base = (unsigned long)map_physmem(addr, 0, MAP_NOCACHE);
421#endif
422
Philipp Tomsiche74958e2017-06-07 18:46:02 +0200423 plat->reg_offset = dev_read_u32_default(dev, "reg-offset", 0);
424 plat->reg_shift = dev_read_u32_default(dev, "reg-shift", 0);
Paul Burton8aadc562016-09-08 07:47:29 +0100425
426 err = clk_get_by_index(dev, 0, &clk);
427 if (!err) {
428 err = clk_get_rate(&clk);
429 if (!IS_ERR_VALUE(err))
430 plat->clock = err;
Alexandre Courboteaa24e7f2016-09-30 17:37:00 +0900431 } else if (err != -ENOENT && err != -ENODEV && err != -ENOSYS) {
Paul Burton8aadc562016-09-08 07:47:29 +0100432 debug("ns16550 failed to get clock\n");
433 return err;
434 }
435
436 if (!plat->clock)
Philipp Tomsiche74958e2017-06-07 18:46:02 +0200437 plat->clock = dev_read_u32_default(dev, "clock-frequency",
438 CONFIG_SYS_NS16550_CLK);
Thomas Chou16b2e7e2015-11-19 21:48:05 +0800439 if (!plat->clock) {
440 debug("ns16550 clock not defined\n");
441 return -EINVAL;
442 }
Simon Glass79a9da32014-09-04 16:27:34 -0600443
Heiko Schocher06f108e2017-01-18 08:05:49 +0100444 plat->fcr = UART_FCR_DEFVAL;
Marek Vasut92a744f2016-12-01 02:06:31 +0100445 if (port_type == PORT_JZ4780)
446 plat->fcr |= UART_FCR_UME;
Marek Vasutf523c9c2016-12-01 02:06:29 +0100447
Simon Glass79a9da32014-09-04 16:27:34 -0600448 return 0;
449}
Simon Glass3bf04f32014-10-22 21:37:05 -0600450#endif
Simon Glass79a9da32014-09-04 16:27:34 -0600451
452const struct dm_serial_ops ns16550_serial_ops = {
453 .putc = ns16550_serial_putc,
454 .pending = ns16550_serial_pending,
455 .getc = ns16550_serial_getc,
456 .setbrg = ns16550_serial_setbrg,
457};
Thomas Chou16b2e7e2015-11-19 21:48:05 +0800458
Alexandru Gagniucb1ab1892017-03-27 12:54:19 -0700459#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
Thomas Choudad53672015-12-14 20:45:09 +0800460/*
461 * Please consider existing compatible strings before adding a new
462 * one to keep this table compact. Or you may add a generic "ns16550"
463 * compatible string to your dts.
464 */
Thomas Chou16b2e7e2015-11-19 21:48:05 +0800465static const struct udevice_id ns16550_serial_ids[] = {
Marek Vasut1a59eec2016-12-01 02:06:30 +0100466 { .compatible = "ns16550", .data = PORT_NS16550 },
467 { .compatible = "ns16550a", .data = PORT_NS16550 },
Marek Vasut92a744f2016-12-01 02:06:31 +0100468 { .compatible = "ingenic,jz4780-uart", .data = PORT_JZ4780 },
Marek Vasut1a59eec2016-12-01 02:06:30 +0100469 { .compatible = "nvidia,tegra20-uart", .data = PORT_NS16550 },
470 { .compatible = "snps,dw-apb-uart", .data = PORT_NS16550 },
Thomas Chou16b2e7e2015-11-19 21:48:05 +0800471 {}
472};
Alexandru Gagniucb1ab1892017-03-27 12:54:19 -0700473#endif /* OF_CONTROL && !OF_PLATDATA */
Thomas Chou16b2e7e2015-11-19 21:48:05 +0800474
Simon Glass9ebf3482015-12-13 21:36:59 -0700475#if CONFIG_IS_ENABLED(SERIAL_PRESENT)
Alexandru Gagniucb1ab1892017-03-27 12:54:19 -0700476
477/* TODO(sjg@chromium.org): Integrate this into a macro like CONFIG_IS_ENABLED */
478#if !defined(CONFIG_TPL_BUILD) || defined(CONFIG_TPL_DM_SERIAL)
Thomas Chou16b2e7e2015-11-19 21:48:05 +0800479U_BOOT_DRIVER(ns16550_serial) = {
480 .name = "ns16550_serial",
481 .id = UCLASS_SERIAL,
Alexandru Gagniucb1ab1892017-03-27 12:54:19 -0700482#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
Thomas Chou16b2e7e2015-11-19 21:48:05 +0800483 .of_match = ns16550_serial_ids,
484 .ofdata_to_platdata = ns16550_serial_ofdata_to_platdata,
485 .platdata_auto_alloc_size = sizeof(struct ns16550_platdata),
486#endif
487 .priv_auto_alloc_size = sizeof(struct NS16550),
488 .probe = ns16550_serial_probe,
489 .ops = &ns16550_serial_ops,
Bin Mengbdb33d82018-10-24 06:36:36 -0700490#if !CONFIG_IS_ENABLED(OF_CONTROL)
Simon Glass6ef533e2015-12-04 08:58:38 -0700491 .flags = DM_FLAG_PRE_RELOC,
Bin Mengbdb33d82018-10-24 06:36:36 -0700492#endif
Thomas Chou16b2e7e2015-11-19 21:48:05 +0800493};
Simon Glass9ebf3482015-12-13 21:36:59 -0700494#endif
Alexandru Gagniucb1ab1892017-03-27 12:54:19 -0700495#endif /* SERIAL_PRESENT */
496
Simon Glass79a9da32014-09-04 16:27:34 -0600497#endif /* CONFIG_DM_SERIAL */