1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26 /*
27 * Silicon Image 3XXX controller specific processing
28 *
29 * This file may be expanded to take advantage of Silicon Image
30 * additional features (if applicable to specific controller model):
31 * 1. Virtual DMA operation
32 * 2. Concurrent all-channel DMA
33 * 3. Large Block Transfers
34 * 4. Watchdog Timer
35 * 5. Power Management
36 * 6. Hot Plug Support
37 */
38
39 #pragma ident "%Z%%M% %I% %E% SMI"
40
41 #include "ata_common.h"
42 #include "sil3xxx.h"
43 #include <sys/pci.h>
44
45 int fifocntctl[] = {FIFO_CNTCTL_0, FIFO_CNTCTL_1, FIFO_CNTCTL_2, FIFO_CNTCTL_3};
46 int sfiscfg[] = {SFISCFG_0, SFISCFG_1, SFISCFG_2, SFISCFG_3};
47
48 /*
49 * Controller specific initialization
50 */
51 uint_t
52 sil3xxx_init_controller(dev_info_t *dip,
53 /* LINTED */
54 ushort_t vendor_id, ushort_t device_id)
55 {
56 ddi_acc_handle_t pci_conf_handle; /* pci config space handle */
57 uint8_t cache_lnsz, frrc = 0;
58 uint32_t fifo_cnt_ctl;
59 int ports, i;
60
61 #ifdef DEBUG
62 /* LINTED */
63 ushort_t sfiscfg_val;
64 #endif
65
66 /*
67 * Sil3114, Sil3512, Sil3112
68 * We want to perform this initialization only once per entire
69 * pciide controller (all channels)
70 */
71 if (ddi_prop_exists(DDI_DEV_T_ANY, ddi_get_parent(dip),
72 DDI_PROP_DONTPASS, "sil3xxx-initialized")) {
73 return (TRUE);
74 }
75
76 if (pci_config_setup(ddi_get_parent(dip), &pci_conf_handle) !=
77 DDI_SUCCESS) {
78 cmn_err(CE_WARN,
79 "sil3xxx_init_controller: Can't do pci_config_setup\n");
80 return (FALSE);
81 }
82
83 /*
84 * Sil3114/3512/3112 incorrectly change between MR and back to
85 * MRM for same transaction, which violates the PCI spec and can
86 * lead to incorrect data reads. The workaround
87 * is to set bits 2:0 in the FIFO count and control register so
88 * that its value, a multiple of 32 bytes starting at 32, not 0,
89 * is greater or equal to the cacheline size, a multiple of 4
90 * bytes. This will prevent any reads until the FIFO free space
91 * is greater than a cacheline size, ensuring only MRM is issued.
92 */
93
94 cache_lnsz = pci_config_get8(pci_conf_handle, PCI_CONF_CACHE_LINESZ);
95
96 /*
97 * The cache line is specified in 32-bit words, so multiply by 4
98 * to get bytes. Then divide by 32 bytes, the granularity of the
99 * FIFO control bits 2:0. Add 1 if there is any remainder to
100 * account for a partial 32-byte block, then subtract 1 since for
101 * FIFO controls bits 2:0, 0 corresponds to 32, 1 corresponds to
102 * 64, and so on. The calculation is expanded for clarity.
103 */
104 if (cache_lnsz != 0) {
105 frrc = (cache_lnsz * 4 / 32) +
106 (((cache_lnsz * 4) % 32) ? 1 : 0) - 1;
107 }
108
109 if (device_id == SIL3114_DEVICE_ID) {
110 ports = 4;
111 } else {
112 ports = 2;
113 }
114
115 /*
116 * The following BAR5 registers are accessed via an indirect register
117 * in the PCI configuration space rather than mapping BAR5.
118 */
119 for (i = 0; i < ports; i++) {
120 GET_BAR5_INDIRECT(pci_conf_handle, fifocntctl[i],
121 fifo_cnt_ctl);
122 fifo_cnt_ctl = (fifo_cnt_ctl & ~0x7) | (frrc & 0x7);
123 PUT_BAR5_INDIRECT(pci_conf_handle, fifocntctl[i],
124 fifo_cnt_ctl);
125 /*
126 * Correct default setting for FIS0cfg
127 */
128 #ifdef DEBUG
129 GET_BAR5_INDIRECT(pci_conf_handle, sfiscfg[i],
130 sfiscfg_val);
131 ADBG_WARN(("sil3xxx_init_controller: old val SFISCfg "
132 "ch%d: %x\n", i, sfiscfg_val));
133 #endif
134 PUT_BAR5_INDIRECT(pci_conf_handle, sfiscfg[i],
135 SFISCFG_ERRATA);
136 #ifdef DEBUG
137 GET_BAR5_INDIRECT(pci_conf_handle, sfiscfg[i],
138 sfiscfg_val);
139 ADBG_WARN(("sil3xxx_init_controller: new val SFISCfg "
140 "ch%d: %x\n", i, sfiscfg_val));
141 #endif
142 }
143
144 /* Now tear down the pci config setup */
145 pci_config_teardown(&pci_conf_handle);
146
147 /* Create property indicating that initialization was done */
148 (void) ddi_prop_update_int(DDI_DEV_T_NONE, ddi_get_parent(dip),
149 "sil3xxx-initialized", 1);
150
151 return (TRUE);
152 }