1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
|
Index: linux/drivers/serial/amba-pl010.c
===================================================================
--- linux.orig/drivers/serial/amba-pl010.c
+++ linux/drivers/serial/amba-pl010.c
@@ -52,11 +52,10 @@
#include <asm/io.h>
-#define UART_NR 8
-
#define SERIAL_AMBA_MAJOR 204
#define SERIAL_AMBA_MINOR 16
-#define SERIAL_AMBA_NR UART_NR
+#define SERIAL_AMBA_NR CONFIG_SERIAL_AMBA_PL010_NUMPORTS
+#define SERIAL_AMBA_NAME CONFIG_SERIAL_AMBA_PL010_PORTNAME
#define AMBA_ISR_PASS_LIMIT 256
@@ -82,7 +81,7 @@ static void pl010_stop_tx(struct uart_po
struct uart_amba_port *uap = (struct uart_amba_port *)port;
unsigned int cr;
- cr = readb(uap->port.membase + UART010_CR);
+ cr = readl(uap->port.membase + UART010_CR);
cr &= ~UART010_CR_TIE;
writel(cr, uap->port.membase + UART010_CR);
}
@@ -92,7 +91,7 @@ static void pl010_start_tx(struct uart_p
struct uart_amba_port *uap = (struct uart_amba_port *)port;
unsigned int cr;
- cr = readb(uap->port.membase + UART010_CR);
+ cr = readl(uap->port.membase + UART010_CR);
cr |= UART010_CR_TIE;
writel(cr, uap->port.membase + UART010_CR);
}
@@ -102,7 +101,7 @@ static void pl010_stop_rx(struct uart_po
struct uart_amba_port *uap = (struct uart_amba_port *)port;
unsigned int cr;
- cr = readb(uap->port.membase + UART010_CR);
+ cr = readl(uap->port.membase + UART010_CR);
cr &= ~(UART010_CR_RIE | UART010_CR_RTIE);
writel(cr, uap->port.membase + UART010_CR);
}
@@ -112,7 +111,7 @@ static void pl010_enable_ms(struct uart_
struct uart_amba_port *uap = (struct uart_amba_port *)port;
unsigned int cr;
- cr = readb(uap->port.membase + UART010_CR);
+ cr = readl(uap->port.membase + UART010_CR);
cr |= UART010_CR_MSIE;
writel(cr, uap->port.membase + UART010_CR);
}
@@ -122,9 +121,9 @@ static void pl010_rx_chars(struct uart_a
struct tty_struct *tty = uap->port.info->tty;
unsigned int status, ch, flag, rsr, max_count = 256;
- status = readb(uap->port.membase + UART01x_FR);
+ status = readl(uap->port.membase + UART01x_FR);
while (UART_RX_DATA(status) && max_count--) {
- ch = readb(uap->port.membase + UART01x_DR);
+ ch = readl(uap->port.membase + UART01x_DR);
flag = TTY_NORMAL;
uap->port.icount.rx++;
@@ -133,7 +132,7 @@ static void pl010_rx_chars(struct uart_a
* Note that the error handling code is
* out of the main execution path
*/
- rsr = readb(uap->port.membase + UART01x_RSR) | UART_DUMMY_RSR_RX;
+ rsr = readl(uap->port.membase + UART01x_RSR) | UART_DUMMY_RSR_RX;
if (unlikely(rsr & UART01x_RSR_ANY)) {
writel(0, uap->port.membase + UART01x_ECR);
@@ -165,7 +164,7 @@ static void pl010_rx_chars(struct uart_a
uart_insert_char(&uap->port, rsr, UART01x_RSR_OE, ch, flag);
ignore_char:
- status = readb(uap->port.membase + UART01x_FR);
+ status = readl(uap->port.membase + UART01x_FR);
}
spin_unlock(&uap->port.lock);
tty_flip_buffer_push(tty);
@@ -210,7 +209,7 @@ static void pl010_modem_status(struct ua
writel(0, uap->port.membase + UART010_ICR);
- status = readb(uap->port.membase + UART01x_FR) & UART01x_FR_MODEM_ANY;
+ status = readl(uap->port.membase + UART01x_FR) & UART01x_FR_MODEM_ANY;
delta = status ^ uap->old_status;
uap->old_status = status;
@@ -238,7 +237,7 @@ static irqreturn_t pl010_int(int irq, vo
spin_lock(&uap->port.lock);
- status = readb(uap->port.membase + UART010_IIR);
+ status = readl(uap->port.membase + UART010_IIR);
if (status) {
do {
if (status & (UART010_IIR_RTIS | UART010_IIR_RIS))
@@ -251,7 +250,7 @@ static irqreturn_t pl010_int(int irq, vo
if (pass_counter-- == 0)
break;
- status = readb(uap->port.membase + UART010_IIR);
+ status = readl(uap->port.membase + UART010_IIR);
} while (status & (UART010_IIR_RTIS | UART010_IIR_RIS |
UART010_IIR_TIS));
handled = 1;
@@ -265,7 +264,7 @@ static irqreturn_t pl010_int(int irq, vo
static unsigned int pl010_tx_empty(struct uart_port *port)
{
struct uart_amba_port *uap = (struct uart_amba_port *)port;
- unsigned int status = readb(uap->port.membase + UART01x_FR);
+ unsigned int status = readl(uap->port.membase + UART01x_FR);
return status & UART01x_FR_BUSY ? 0 : TIOCSER_TEMT;
}
@@ -275,7 +274,7 @@ static unsigned int pl010_get_mctrl(stru
unsigned int result = 0;
unsigned int status;
- status = readb(uap->port.membase + UART01x_FR);
+ status = readl(uap->port.membase + UART01x_FR);
if (status & UART01x_FR_DCD)
result |= TIOCM_CAR;
if (status & UART01x_FR_DSR)
@@ -301,7 +300,7 @@ static void pl010_break_ctl(struct uart_
unsigned int lcr_h;
spin_lock_irqsave(&uap->port.lock, flags);
- lcr_h = readb(uap->port.membase + UART010_LCRH);
+ lcr_h = readl(uap->port.membase + UART010_LCRH);
if (break_state == -1)
lcr_h |= UART01x_LCRH_BRK;
else
@@ -334,7 +333,7 @@ static int pl010_startup(struct uart_por
/*
* initialise the old status of the modem signals
*/
- uap->old_status = readb(uap->port.membase + UART01x_FR) & UART01x_FR_MODEM_ANY;
+ uap->old_status = readl(uap->port.membase + UART01x_FR) & UART01x_FR_MODEM_ANY;
/*
* Finally, enable interrupts
@@ -365,7 +364,7 @@ static void pl010_shutdown(struct uart_p
writel(0, uap->port.membase + UART010_CR);
/* disable break condition and fifos */
- writel(readb(uap->port.membase + UART010_LCRH) &
+ writel(readl(uap->port.membase + UART010_LCRH) &
~(UART01x_LCRH_BRK | UART01x_LCRH_FEN),
uap->port.membase + UART010_LCRH);
@@ -387,7 +386,7 @@ pl010_set_termios(struct uart_port *port
/*
* Ask the core to calculate the divisor for us.
*/
- baud = uart_get_baud_rate(port, termios, old, 0, uap->port.uartclk/16);
+ baud = uart_get_baud_rate(port, termios, old, 0, uap->port.uartclk/16);
quot = uart_get_divisor(port, baud);
switch (termios->c_cflag & CSIZE) {
@@ -450,7 +449,7 @@ pl010_set_termios(struct uart_port *port
uap->port.ignore_status_mask |= UART_DUMMY_RSR_RX;
/* first, disable everything */
- old_cr = readb(uap->port.membase + UART010_CR) & ~UART010_CR_MSIE;
+ old_cr = readl(uap->port.membase + UART010_CR) & ~UART010_CR_MSIE;
if (UART_ENABLE_MS(port, termios->c_cflag))
old_cr |= UART010_CR_MSIE;
@@ -540,7 +539,7 @@ static struct uart_ops amba_pl010_pops =
.verify_port = pl010_verify_port,
};
-static struct uart_amba_port *amba_ports[UART_NR];
+static struct uart_amba_port *amba_ports[SERIAL_AMBA_NR];
#ifdef CONFIG_SERIAL_AMBA_PL010_CONSOLE
@@ -550,7 +549,7 @@ static void pl010_console_putchar(struct
unsigned int status;
do {
- status = readb(uap->port.membase + UART01x_FR);
+ status = readl(uap->port.membase + UART01x_FR);
barrier();
} while (!UART_TX_READY(status));
writel(ch, uap->port.membase + UART01x_DR);
@@ -567,7 +566,7 @@ pl010_console_write(struct console *co,
/*
* First save the CR then disable the interrupts
*/
- old_cr = readb(uap->port.membase + UART010_CR);
+ old_cr = readl(uap->port.membase + UART010_CR);
writel(UART01x_CR_UARTEN, uap->port.membase + UART010_CR);
uart_console_write(&uap->port, s, count, pl010_console_putchar);
@@ -577,7 +576,7 @@ pl010_console_write(struct console *co,
* and restore the TCR
*/
do {
- status = readb(uap->port.membase + UART01x_FR);
+ status = readl(uap->port.membase + UART01x_FR);
barrier();
} while (status & UART01x_FR_BUSY);
writel(old_cr, uap->port.membase + UART010_CR);
@@ -589,9 +588,9 @@ static void __init
pl010_console_get_options(struct uart_amba_port *uap, int *baud,
int *parity, int *bits)
{
- if (readb(uap->port.membase + UART010_CR) & UART01x_CR_UARTEN) {
+ if (readl(uap->port.membase + UART010_CR) & UART01x_CR_UARTEN) {
unsigned int lcr_h, quot;
- lcr_h = readb(uap->port.membase + UART010_LCRH);
+ lcr_h = readl(uap->port.membase + UART010_LCRH);
*parity = 'n';
if (lcr_h & UART01x_LCRH_PEN) {
@@ -606,8 +605,8 @@ pl010_console_get_options(struct uart_am
else
*bits = 8;
- quot = readb(uap->port.membase + UART010_LCRL) |
- readb(uap->port.membase + UART010_LCRM) << 8;
+ quot = readl(uap->port.membase + UART010_LCRL) |
+ readl(uap->port.membase + UART010_LCRM) << 8;
*baud = uap->port.uartclk / (16 * (quot + 1));
}
}
@@ -625,7 +624,7 @@ static int __init pl010_console_setup(st
* if so, search for the first available port that does have
* console support.
*/
- if (co->index >= UART_NR)
+ if (co->index >= SERIAL_AMBA_NR)
co->index = 0;
uap = amba_ports[co->index];
if (!uap)
@@ -643,7 +642,7 @@ static int __init pl010_console_setup(st
static struct uart_driver amba_reg;
static struct console amba_console = {
- .name = "ttyAM",
+ .name = SERIAL_AMBA_NAME,
.write = pl010_console_write,
.device = uart_console_device,
.setup = pl010_console_setup,
@@ -659,11 +658,11 @@ static struct console amba_console = {
static struct uart_driver amba_reg = {
.owner = THIS_MODULE,
- .driver_name = "ttyAM",
- .dev_name = "ttyAM",
+ .driver_name = SERIAL_AMBA_NAME,
+ .dev_name = SERIAL_AMBA_NAME,
.major = SERIAL_AMBA_MAJOR,
.minor = SERIAL_AMBA_MINOR,
- .nr = UART_NR,
+ .nr = SERIAL_AMBA_NR,
.cons = AMBA_CONSOLE,
};
Index: linux/drivers/serial/Kconfig
===================================================================
--- linux.orig/drivers/serial/Kconfig
+++ linux/drivers/serial/Kconfig
@@ -293,10 +293,25 @@ config SERIAL_AMBA_PL010
help
This selects the ARM(R) AMBA(R) PrimeCell PL010 UART. If you have
an Integrator/AP or Integrator/PP2 platform, or if you have a
- Cirrus Logic EP93xx CPU, say Y or M here.
+ Cirrus Logic EP93xx CPU or an Infineon ADM5120 SOC, say Y or M here.
If unsure, say N.
+config SERIAL_AMBA_PL010_NUMPORTS
+ int "Maximum number of AMBA PL010 serial ports"
+ depends on SERIAL_AMBA_PL010
+ default "8"
+ ---help---
+ Set this to the number of serial ports you want the AMBA PL010 driver
+ to support.
+
+config SERIAL_AMBA_PL010_PORTNAME
+ string "Name of the AMBA PL010 serial ports"
+ depends on SERIAL_AMBA_PL010
+ default "ttyAM"
+ ---help---
+ ::: To be written :::
+
config SERIAL_AMBA_PL010_CONSOLE
bool "Support for console on AMBA serial port"
depends on SERIAL_AMBA_PL010=y
|
