Add support for friendly-arm SBC-2410X board
[oweals/u-boot.git] / drivers / w83c553f.c
1 /*
2  * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
3  * Andreas Heppel <aheppel@sysgo.de>
4  *
5  * See file CREDITS for list of people who contributed to this
6  * project.
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License as
10  * published by the Free Software Foundation; either version 2 of
11  * the License, or (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21  * MA 02111-1307 USA
22  */
23
24 /*
25  * Initialisation of the PCI-to-ISA bridge and disabling the BIOS
26  * write protection (for flash) in function 0 of the chip.
27  * Enabling function 1 (IDE controller of the chip.
28  */
29
30 #include <common.h>
31 #include <config.h>
32
33 #ifdef CFG_WINBOND_83C553
34
35 #include <asm/io.h>
36 #include <pci.h>
37
38 #include <w83c553f.h>
39
40 #define out8(addr,val)  do { \
41                         out_8((u8*) (addr),(val)); udelay(1); \
42                         } while (0)
43 #define out16(addr,val) do { \
44                         out_be16((u16*) (addr),(val)); udelay(1); \
45                         } while (0)
46
47 extern uint ide_bus_offset[CFG_IDE_MAXBUS];
48
49 void initialise_pic(void);
50 void initialise_dma(void);
51
52 void initialise_w83c553f(void)
53 {
54         pci_dev_t devbusfn;
55         unsigned char reg8;
56         unsigned short reg16;
57         unsigned int reg32;
58
59         devbusfn = pci_find_device(W83C553F_VID, W83C553F_DID, 0);
60         if (devbusfn == -1)
61         {
62                 printf("Error: Cannot find W83C553F controller on any PCI bus.");
63                 return;
64         }
65
66         pci_read_config_word(devbusfn, PCI_COMMAND, &reg16);
67         reg16 |= PCI_COMMAND_MASTER | PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
68         pci_write_config_word(devbusfn, PCI_COMMAND, reg16);
69
70         pci_read_config_byte(devbusfn, WINBOND_IPADCR, &reg8);
71         /* 16 MB ISA memory space */
72         reg8 |= (IPADCR_IPATOM4 | IPADCR_IPATOM5 | IPADCR_IPATOM6 | IPADCR_IPATOM7);
73         reg8 &= ~IPADCR_MBE512;
74         pci_write_config_byte(devbusfn, WINBOND_IPADCR, reg8);
75
76         pci_read_config_byte(devbusfn, WINBOND_CSCR, &reg8);
77         /* switch off BIOS write protection */
78         reg8 |= CSCR_UBIOSCSE;
79         reg8 &= ~CSCR_BIOSWP;
80         pci_write_config_byte(devbusfn, WINBOND_CSCR, reg8);
81
82         /*
83          * Interrupt routing:
84          *  - IDE  -> IRQ 9/0
85          *  - INTA -> IRQ 10
86          *  - INTB -> IRQ 11
87          *  - INTC -> IRQ 14
88          *  - INTD -> IRQ 15
89          */
90         pci_write_config_byte(devbusfn, WINBOND_IDEIRCR, 0x90);
91         pci_write_config_word(devbusfn, WINBOND_PCIIRCR, 0xABEF);
92
93         /*
94          * Read IDE bus offsets from function 1 device.
95          * We must unmask the LSB indicating that ist is an IO address.
96          */
97         devbusfn |= PCI_BDF(0,0,1);
98
99         /*
100          * Switch off legacy IRQ for IDE and IDE port 1.
101          */
102         pci_write_config_byte(devbusfn, 0x09, 0x8F);
103
104         pci_read_config_dword(devbusfn, WINDOND_IDECSR, &reg32);
105         reg32 &= ~(IDECSR_LEGIRQ | IDECSR_P1EN | IDECSR_P1F16);
106         pci_write_config_dword(devbusfn, WINDOND_IDECSR, reg32);
107
108         pci_read_config_dword(devbusfn, PCI_BASE_ADDRESS_0, &ide_bus_offset[0]);
109         ide_bus_offset[0] &= ~1;
110 #if CFG_IDE_MAXBUS > 1
111         pci_read_config_dword(devbusfn, PCI_BASE_ADDRESS_2, &ide_bus_offset[1]);
112         ide_bus_offset[1] &= ~1;
113 #endif
114
115         /*
116          * Enable function 1, IDE -> busmastering and IO space access
117          */
118         pci_read_config_word(devbusfn, PCI_COMMAND, &reg16);
119         reg16 |= PCI_COMMAND_MASTER | PCI_COMMAND_IO;
120         pci_write_config_word(devbusfn, PCI_COMMAND, reg16);
121
122         /*
123          * Initialise ISA interrupt controller
124          */
125         initialise_pic();
126
127         /*
128          * Initialise DMA controller
129          */
130         initialise_dma();
131 }
132
133 void initialise_pic(void)
134 {
135         out8(W83C553F_PIC1_ICW1, 0x11);
136         out8(W83C553F_PIC1_ICW2, 0x08);
137         out8(W83C553F_PIC1_ICW3, 0x04);
138         out8(W83C553F_PIC1_ICW4, 0x01);
139         out8(W83C553F_PIC1_OCW1, 0xfb);
140         out8(W83C553F_PIC1_ELC, 0x20);
141
142         out8(W83C553F_PIC2_ICW1, 0x11);
143         out8(W83C553F_PIC2_ICW2, 0x08);
144         out8(W83C553F_PIC2_ICW3, 0x02);
145         out8(W83C553F_PIC2_ICW4, 0x01);
146         out8(W83C553F_PIC2_OCW1, 0xff);
147         out8(W83C553F_PIC2_ELC, 0xce);
148
149         out8(W83C553F_TMR1_CMOD, 0x74);
150
151         out8(W83C553F_PIC2_OCW1, 0x20);
152         out8(W83C553F_PIC1_OCW1, 0x20);
153
154         out8(W83C553F_PIC2_OCW1, 0x2b);
155         out8(W83C553F_PIC1_OCW1, 0x2b);
156 }
157
158 void initialise_dma(void)
159 {
160         unsigned int channel;
161         unsigned int rvalue1, rvalue2;
162
163         /* perform a H/W reset of the devices */
164
165         out8(W83C553F_DMA1 + W83C553F_DMA1_MC, 0x00);
166         out16(W83C553F_DMA2 + W83C553F_DMA2_MC, 0x0000);
167
168         /* initialise all channels to a sane state */
169
170         for (channel = 0; channel < 4; channel++) {
171                 /*
172                  * dependent upon the channel, setup the specifics:
173                  *
174                  * demand
175                  * address-increment
176                  * autoinitialize-disable
177                  * verify-transfer
178                  */
179
180                 switch (channel) {
181                 case 0:
182                         rvalue1 = (W83C553F_MODE_TM_DEMAND|W83C553F_MODE_CH0SEL|W83C553F_MODE_TT_VERIFY);
183                         rvalue2 = (W83C553F_MODE_TM_CASCADE|W83C553F_MODE_CH0SEL);
184                         break;
185                 case 1:
186                         rvalue1 = (W83C553F_MODE_TM_DEMAND|W83C553F_MODE_CH1SEL|W83C553F_MODE_TT_VERIFY);
187                         rvalue2 = (W83C553F_MODE_TM_DEMAND|W83C553F_MODE_CH1SEL|W83C553F_MODE_TT_VERIFY);
188                         break;
189                 case 2:
190                         rvalue1 = (W83C553F_MODE_TM_DEMAND|W83C553F_MODE_CH2SEL|W83C553F_MODE_TT_VERIFY);
191                         rvalue2 = (W83C553F_MODE_TM_DEMAND|W83C553F_MODE_CH2SEL|W83C553F_MODE_TT_VERIFY);
192                         break;
193                 case 3:
194                         rvalue1 = (W83C553F_MODE_TM_DEMAND|W83C553F_MODE_CH3SEL|W83C553F_MODE_TT_VERIFY);
195                         rvalue2 = (W83C553F_MODE_TM_DEMAND|W83C553F_MODE_CH3SEL|W83C553F_MODE_TT_VERIFY);
196                         break;
197                 default:
198                         rvalue1 = 0x00;
199                         rvalue2 = 0x00;
200                         break;
201                 }
202
203                 /* write to write mode registers */
204
205                 out8(W83C553F_DMA1 + W83C553F_DMA1_WM, rvalue1 & 0xFF);
206                 out16(W83C553F_DMA2 + W83C553F_DMA2_WM, rvalue2 & 0x00FF);
207         }
208
209         /* enable all channels */
210
211         out8(W83C553F_DMA1 + W83C553F_DMA1_CM, 0x00);
212         out16(W83C553F_DMA2 + W83C553F_DMA2_CM, 0x0000);
213         /*
214          * initialize the global DMA configuration
215          *
216          * DACK# active low
217          * DREQ active high
218          * fixed priority
219          * channel group enable
220          */
221
222         out8(W83C553F_DMA1 + W83C553F_DMA1_CS, 0x00);
223         out16(W83C553F_DMA2 + W83C553F_DMA2_CS, 0x0000);
224 }
225
226 #endif /* CFG_WINBOND_83C553 */