Merge rsync://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[linux-2.6] / drivers / serial / cpm_uart / cpm_uart_cpm1.c
1 /*
2  *  linux/drivers/serial/cpm_uart.c
3  *
4  *  Driver for CPM (SCC/SMC) serial ports; CPM1 definitions
5  *
6  *  Maintainer: Kumar Gala (galak@kernel.crashing.org) (CPM2)
7  *              Pantelis Antoniou (panto@intracom.gr) (CPM1)
8  *
9  *  Copyright (C) 2004 Freescale Semiconductor, Inc.
10  *            (C) 2004 Intracom, S.A.
11  *            (C) 2006 MontaVista Software, Inc.
12  *              Vitaly Bordug <vbordug@ru.mvista.com>
13  *
14  * This program is free software; you can redistribute it and/or modify
15  * it under the terms of the GNU General Public License as published by
16  * the Free Software Foundation; either version 2 of the License, or
17  * (at your option) any later version.
18  *
19  * This program is distributed in the hope that it will be useful,
20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
22  * GNU General Public License for more details.
23  *
24  * You should have received a copy of the GNU General Public License
25  * along with this program; if not, write to the Free Software
26  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
27  *
28  */
29
30 #include <linux/module.h>
31 #include <linux/tty.h>
32 #include <linux/ioport.h>
33 #include <linux/init.h>
34 #include <linux/serial.h>
35 #include <linux/console.h>
36 #include <linux/sysrq.h>
37 #include <linux/device.h>
38 #include <linux/bootmem.h>
39 #include <linux/dma-mapping.h>
40
41 #include <asm/io.h>
42 #include <asm/irq.h>
43
44 #include <linux/serial_core.h>
45 #include <linux/kernel.h>
46
47 #include "cpm_uart.h"
48
49 /**************************************************************/
50
51 void cpm_line_cr_cmd(int line, int cmd)
52 {
53         ushort val;
54         volatile cpm8xx_t *cp = cpmp;
55
56         switch (line) {
57         case UART_SMC1:
58                 val = mk_cr_cmd(CPM_CR_CH_SMC1, cmd) | CPM_CR_FLG;
59                 break;
60         case UART_SMC2:
61                 val = mk_cr_cmd(CPM_CR_CH_SMC2, cmd) | CPM_CR_FLG;
62                 break;
63         case UART_SCC1:
64                 val = mk_cr_cmd(CPM_CR_CH_SCC1, cmd) | CPM_CR_FLG;
65                 break;
66         case UART_SCC2:
67                 val = mk_cr_cmd(CPM_CR_CH_SCC2, cmd) | CPM_CR_FLG;
68                 break;
69         case UART_SCC3:
70                 val = mk_cr_cmd(CPM_CR_CH_SCC3, cmd) | CPM_CR_FLG;
71                 break;
72         case UART_SCC4:
73                 val = mk_cr_cmd(CPM_CR_CH_SCC4, cmd) | CPM_CR_FLG;
74                 break;
75         default:
76                 return;
77
78         }
79         cp->cp_cpcr = val;
80         while (cp->cp_cpcr & CPM_CR_FLG) ;
81 }
82
83 void smc1_lineif(struct uart_cpm_port *pinfo)
84 {
85         pinfo->brg = 1;
86 }
87
88 void smc2_lineif(struct uart_cpm_port *pinfo)
89 {
90         pinfo->brg = 2;
91 }
92
93 void scc1_lineif(struct uart_cpm_port *pinfo)
94 {
95         /* XXX SCC1: insert port configuration here */
96         pinfo->brg = 1;
97 }
98
99 void scc2_lineif(struct uart_cpm_port *pinfo)
100 {
101         /* XXX SCC2: insert port configuration here */
102         pinfo->brg = 2;
103 }
104
105 void scc3_lineif(struct uart_cpm_port *pinfo)
106 {
107         /* XXX SCC3: insert port configuration here */
108         pinfo->brg = 3;
109 }
110
111 void scc4_lineif(struct uart_cpm_port *pinfo)
112 {
113         /* XXX SCC4: insert port configuration here */
114         pinfo->brg = 4;
115 }
116
117 /*
118  * Allocate DP-Ram and memory buffers. We need to allocate a transmit and
119  * receive buffer descriptors from dual port ram, and a character
120  * buffer area from host mem. If we are allocating for the console we need
121  * to do it from bootmem
122  */
123 int cpm_uart_allocbuf(struct uart_cpm_port *pinfo, unsigned int is_con)
124 {
125         int dpmemsz, memsz;
126         u8 *dp_mem;
127         uint dp_offset;
128         u8 *mem_addr;
129         dma_addr_t dma_addr = 0;
130
131         pr_debug("CPM uart[%d]:allocbuf\n", pinfo->port.line);
132
133         dpmemsz = sizeof(cbd_t) * (pinfo->rx_nrfifos + pinfo->tx_nrfifos);
134         dp_offset = cpm_dpalloc(dpmemsz, 8);
135         if (IS_DPERR(dp_offset)) {
136                 printk(KERN_ERR
137                        "cpm_uart_cpm1.c: could not allocate buffer descriptors\n");
138                 return -ENOMEM;
139         }
140         dp_mem = cpm_dpram_addr(dp_offset);
141
142         memsz = L1_CACHE_ALIGN(pinfo->rx_nrfifos * pinfo->rx_fifosize) +
143             L1_CACHE_ALIGN(pinfo->tx_nrfifos * pinfo->tx_fifosize);
144         if (is_con) {
145                 /* was hostalloc but changed cause it blows away the */
146                 /* large tlb mapping when pinning the kernel area    */
147                 mem_addr = (u8 *) cpm_dpram_addr(cpm_dpalloc(memsz, 8));
148                 dma_addr = (u32)mem_addr;
149         } else
150                 mem_addr = dma_alloc_coherent(NULL, memsz, &dma_addr,
151                                               GFP_KERNEL);
152
153         if (mem_addr == NULL) {
154                 cpm_dpfree(dp_offset);
155                 printk(KERN_ERR
156                        "cpm_uart_cpm1.c: could not allocate coherent memory\n");
157                 return -ENOMEM;
158         }
159
160         pinfo->dp_addr = dp_offset;
161         pinfo->mem_addr = mem_addr;             /*  virtual address*/
162         pinfo->dma_addr = dma_addr;             /*  physical address*/
163         pinfo->mem_size = memsz;
164
165         pinfo->rx_buf = mem_addr;
166         pinfo->tx_buf = pinfo->rx_buf + L1_CACHE_ALIGN(pinfo->rx_nrfifos
167                                                        * pinfo->rx_fifosize);
168
169         pinfo->rx_bd_base = (volatile cbd_t *)dp_mem;
170         pinfo->tx_bd_base = pinfo->rx_bd_base + pinfo->rx_nrfifos;
171
172         return 0;
173 }
174
175 void cpm_uart_freebuf(struct uart_cpm_port *pinfo)
176 {
177         dma_free_coherent(NULL, L1_CACHE_ALIGN(pinfo->rx_nrfifos *
178                                                pinfo->rx_fifosize) +
179                           L1_CACHE_ALIGN(pinfo->tx_nrfifos *
180                                          pinfo->tx_fifosize), pinfo->mem_addr,
181                           pinfo->dma_addr);
182
183         cpm_dpfree(pinfo->dp_addr);
184 }
185
186 /* Setup any dynamic params in the uart desc */
187 int cpm_uart_init_portdesc(void)
188 {
189         pr_debug("CPM uart[-]:init portdesc\n");
190
191         cpm_uart_nr = 0;
192 #ifdef CONFIG_SERIAL_CPM_SMC1
193         cpm_uart_ports[UART_SMC1].smcp = &cpmp->cp_smc[0];
194 /*
195  *  Is SMC1 being relocated?
196  */
197 # ifdef CONFIG_I2C_SPI_SMC1_UCODE_PATCH
198         cpm_uart_ports[UART_SMC1].smcup =
199             (smc_uart_t *) & cpmp->cp_dparam[0x3C0];
200 # else
201         cpm_uart_ports[UART_SMC1].smcup =
202             (smc_uart_t *) & cpmp->cp_dparam[PROFF_SMC1];
203 # endif
204         cpm_uart_ports[UART_SMC1].port.mapbase =
205             (unsigned long)&cpmp->cp_smc[0];
206         cpm_uart_ports[UART_SMC1].smcp->smc_smcm |= (SMCM_RX | SMCM_TX);
207         cpm_uart_ports[UART_SMC1].smcp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN);
208         cpm_uart_ports[UART_SMC1].port.uartclk = (((bd_t *) __res)->bi_intfreq);
209         cpm_uart_port_map[cpm_uart_nr++] = UART_SMC1;
210 #endif
211
212 #ifdef CONFIG_SERIAL_CPM_SMC2
213         cpm_uart_ports[UART_SMC2].smcp = &cpmp->cp_smc[1];
214         cpm_uart_ports[UART_SMC2].smcup =
215             (smc_uart_t *) & cpmp->cp_dparam[PROFF_SMC2];
216         cpm_uart_ports[UART_SMC2].port.mapbase =
217             (unsigned long)&cpmp->cp_smc[1];
218         cpm_uart_ports[UART_SMC2].smcp->smc_smcm |= (SMCM_RX | SMCM_TX);
219         cpm_uart_ports[UART_SMC2].smcp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN);
220         cpm_uart_ports[UART_SMC2].port.uartclk = (((bd_t *) __res)->bi_intfreq);
221         cpm_uart_port_map[cpm_uart_nr++] = UART_SMC2;
222 #endif
223
224 #ifdef CONFIG_SERIAL_CPM_SCC1
225         cpm_uart_ports[UART_SCC1].sccp = &cpmp->cp_scc[0];
226         cpm_uart_ports[UART_SCC1].sccup =
227             (scc_uart_t *) & cpmp->cp_dparam[PROFF_SCC1];
228         cpm_uart_ports[UART_SCC1].port.mapbase =
229             (unsigned long)&cpmp->cp_scc[0];
230         cpm_uart_ports[UART_SCC1].sccp->scc_sccm &=
231             ~(UART_SCCM_TX | UART_SCCM_RX);
232         cpm_uart_ports[UART_SCC1].sccp->scc_gsmrl &=
233             ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
234         cpm_uart_ports[UART_SCC1].port.uartclk = (((bd_t *) __res)->bi_intfreq);
235         cpm_uart_port_map[cpm_uart_nr++] = UART_SCC1;
236 #endif
237
238 #ifdef CONFIG_SERIAL_CPM_SCC2
239         cpm_uart_ports[UART_SCC2].sccp = &cpmp->cp_scc[1];
240         cpm_uart_ports[UART_SCC2].sccup =
241             (scc_uart_t *) & cpmp->cp_dparam[PROFF_SCC2];
242         cpm_uart_ports[UART_SCC2].port.mapbase =
243             (unsigned long)&cpmp->cp_scc[1];
244         cpm_uart_ports[UART_SCC2].sccp->scc_sccm &=
245             ~(UART_SCCM_TX | UART_SCCM_RX);
246         cpm_uart_ports[UART_SCC2].sccp->scc_gsmrl &=
247             ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
248         cpm_uart_ports[UART_SCC2].port.uartclk = (((bd_t *) __res)->bi_intfreq);
249         cpm_uart_port_map[cpm_uart_nr++] = UART_SCC2;
250 #endif
251
252 #ifdef CONFIG_SERIAL_CPM_SCC3
253         cpm_uart_ports[UART_SCC3].sccp = &cpmp->cp_scc[2];
254         cpm_uart_ports[UART_SCC3].sccup =
255             (scc_uart_t *) & cpmp->cp_dparam[PROFF_SCC3];
256         cpm_uart_ports[UART_SCC3].port.mapbase =
257             (unsigned long)&cpmp->cp_scc[2];
258         cpm_uart_ports[UART_SCC3].sccp->scc_sccm &=
259             ~(UART_SCCM_TX | UART_SCCM_RX);
260         cpm_uart_ports[UART_SCC3].sccp->scc_gsmrl &=
261             ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
262         cpm_uart_ports[UART_SCC3].port.uartclk = (((bd_t *) __res)->bi_intfreq);
263         cpm_uart_port_map[cpm_uart_nr++] = UART_SCC3;
264 #endif
265
266 #ifdef CONFIG_SERIAL_CPM_SCC4
267         cpm_uart_ports[UART_SCC4].sccp = &cpmp->cp_scc[3];
268         cpm_uart_ports[UART_SCC4].sccup =
269             (scc_uart_t *) & cpmp->cp_dparam[PROFF_SCC4];
270         cpm_uart_ports[UART_SCC4].port.mapbase =
271             (unsigned long)&cpmp->cp_scc[3];
272         cpm_uart_ports[UART_SCC4].sccp->scc_sccm &=
273             ~(UART_SCCM_TX | UART_SCCM_RX);
274         cpm_uart_ports[UART_SCC4].sccp->scc_gsmrl &=
275             ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
276         cpm_uart_ports[UART_SCC4].port.uartclk = (((bd_t *) __res)->bi_intfreq);
277         cpm_uart_port_map[cpm_uart_nr++] = UART_SCC4;
278 #endif
279         return 0;
280 }