diff --git a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug
index 06eb62b0fd909799d472155451237ae95eb69925..1b8a9c905cf7f429e13be1ab97f809cd5a92aa80 100644
--- a/arch/powerpc/Kconfig.debug
+++ b/arch/powerpc/Kconfig.debug
@@ -265,8 +265,27 @@ config PPC_EARLY_DEBUG_PS3GELIC
Select this to enable early debugging for the PlayStation3 via
UDP broadcasts sent out through the Ethernet port.
+config PPC_EARLY_DEBUG_OPAL_RAW
+ bool "OPAL raw console"
+ depends on HVC_OPAL
+ help
+ Select this to enable early debugging for the PowerNV platform
+ using a "raw" console
+
+config PPC_EARLY_DEBUG_OPAL_HVSI
+ bool "OPAL hvsi console"
+ depends on HVC_OPAL
+ help
+ Select this to enable early debugging for the PowerNV platform
+ using an "hvsi" console
+
endchoice
+config PPC_EARLY_DEBUG_OPAL
+ def_bool y
+ depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI
+
+
config PPC_EARLY_DEBUG_HVSI_VTERMNO
hex "vterm number to use with early debug HVSI"
depends on PPC_EARLY_DEBUG_LPAR_HVSI
@@ -275,6 +294,18 @@ config PPC_EARLY_DEBUG_HVSI_VTERMNO
You probably want 0x30000000 for your first serial port and
0x30000001 for your second one
+config PPC_EARLY_DEBUG_OPAL_VTERMNO
+ hex "vterm number to use with OPAL early debug"
+ depends on PPC_EARLY_DEBUG_OPAL
+ default "0"
+ help
+ This correspond to which /dev/hvcN you want to use for early
+ debug.
+
+ On OPAL v1 (takeover) this should always be 0
+ On OPAL v2, this will be 0 for network console and 1 or 2 for
+ the machine built-in serial ports.
+
config PPC_EARLY_DEBUG_44x_PHYSLOW
hex "Low 32 bits of early debug UART physical address"
depends on PPC_EARLY_DEBUG_44x
diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h
index c7a3202d10a0bb1f1c326b787272e2e031b3c431..749de00a02d5d610936c9dbe5b73ad3714c2001f 100644
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h
@@ -425,6 +425,11 @@ extern void hvc_opal_init_early(void);
extern int early_init_dt_scan_opal(unsigned long node, const char *uname,
int depth, void *data);
+extern int opal_get_chars(uint32_t vtermno, char *buf, int count);
+extern int opal_put_chars(uint32_t vtermno, const char *buf, int total_len);
+
+extern void hvc_opal_init_early(void);
+
#endif /* __ASSEMBLY__ */
#endif /* __OPAL_H */
diff --git a/arch/powerpc/include/asm/udbg.h b/arch/powerpc/include/asm/udbg.h
index 7cf796fa03f2dc45c65b360b8788f158fc0e3ede..6587ec7bc6ec8e081b99341323380082b9efee0f 100644
--- a/arch/powerpc/include/asm/udbg.h
+++ b/arch/powerpc/include/asm/udbg.h
@@ -55,6 +55,8 @@ extern void __init udbg_init_cpm(void);
extern void __init udbg_init_usbgecko(void);
extern void __init udbg_init_wsp(void);
extern void __init udbg_init_ps3gelic(void);
+extern void __init udbg_init_debug_opal_raw(void);
+extern void __init udbg_init_debug_opal_hvsi(void);
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_UDBG_H */
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
index dea8191253d2fa698a034247ab66df55ed120016..06c7251c1bf7df7a617627e45f285ee9562a8f47 100644
--- a/arch/powerpc/kernel/head_64.S
+++ b/arch/powerpc/kernel/head_64.S
@@ -53,7 +53,8 @@
* 2. The kernel is entered at __start
* -or- For OPAL entry:
* 1. The MMU is off, processor in HV mode, primary CPU enters at 0
- * with device-tree in gpr3
+ * with device-tree in gpr3. We also get OPAL base in r8 and
+ * entry in r9 for debugging purposes
* 2. Secondary processors enter at 0x60 with PIR in gpr3
*
* For iSeries:
@@ -335,6 +336,11 @@ _GLOBAL(__start_initialization_multiplatform)
/* Save parameters */
mr r31,r3
mr r30,r4
+#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
+ /* Save OPAL entry */
+ mr r28,r8
+ mr r29,r9
+#endif
#ifdef CONFIG_PPC_BOOK3E
bl .start_initialization_book3e
@@ -711,6 +717,12 @@ _INIT_STATIC(start_here_multiplatform)
bdnz 3b
4:
+#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
+ /* Setup OPAL entry */
+ std r28,0(r11);
+ std r29,8(r11);
+#endif
+
#ifndef CONFIG_PPC_BOOK3E
mfmsr r6
ori r6,r6,MSR_RI
diff --git a/arch/powerpc/kernel/udbg.c b/arch/powerpc/kernel/udbg.c
index 5b3e98e0315886e62650039539ad9010c9c8e772..35f948203ec59fc698129057ff544db1d57632a1 100644
--- a/arch/powerpc/kernel/udbg.c
+++ b/arch/powerpc/kernel/udbg.c
@@ -69,6 +69,10 @@ void __init udbg_early_init(void)
udbg_init_wsp();
#elif defined(CONFIG_PPC_EARLY_DEBUG_PS3GELIC)
udbg_init_ps3gelic();
+#elif defined(CONFIG_PPC_EARLY_DEBUG_OPAL_RAW)
+ udbg_init_debug_opal_raw();
+#elif defined(CONFIG_PPC_EARLY_DEBUG_OPAL_HVSI)
+ udbg_init_debug_opal_hvsi();
#endif
#ifdef CONFIG_PPC_EARLY_DEBUG
diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c
index 8d5510784cc2743ff8741ed18413d536ad790698..7887733b9b31731dbdd3d08749436d9451863c88 100644
--- a/arch/powerpc/platforms/powernv/opal.c
+++ b/arch/powerpc/platforms/powernv/opal.c
@@ -67,7 +67,7 @@ int opal_get_chars(uint32_t vtermno, char *buf, int count)
u64 evt;
if (!opal.entry)
- return 0;
+ return -ENODEV;
opal_poll_events(&evt);
if ((evt & OPAL_EVENT_CONSOLE_INPUT) == 0)
return 0;
@@ -81,31 +81,38 @@ int opal_get_chars(uint32_t vtermno, char *buf, int count)
int opal_put_chars(uint32_t vtermno, const char *data, int total_len)
{
int written = 0;
- s64 len, rc = OPAL_BUSY;
+ s64 len, rc;
unsigned long flags;
u64 evt;
if (!opal.entry)
- return 0;
+ return -ENODEV;
/* We want put_chars to be atomic to avoid mangling of hvsi
* packets. To do that, we first test for room and return
- * -EAGAIN if there isn't enough
+ * -EAGAIN if there isn't enough.
+ *
+ * Unfortunately, opal_console_write_buffer_space() doesn't
+ * appear to work on opal v1, so we just assume there is
+ * enough room and be done with it
*/
spin_lock_irqsave(&opal_write_lock, flags);
- rc = opal_console_write_buffer_space(vtermno, &len);
- if (rc || len < total_len) {
- spin_unlock_irqrestore(&opal_write_lock, flags);
- /* Closed -> drop characters */
- if (rc)
- return total_len;
- opal_poll_events(&evt);
- return -EAGAIN;
+ if (firmware_has_feature(FW_FEATURE_OPALv2)) {
+ rc = opal_console_write_buffer_space(vtermno, &len);
+ if (rc || len < total_len) {
+ spin_unlock_irqrestore(&opal_write_lock, flags);
+ /* Closed -> drop characters */
+ if (rc)
+ return total_len;
+ opal_poll_events(&evt);
+ return -EAGAIN;
+ }
}
/* We still try to handle partial completions, though they
* should no longer happen.
*/
+ rc = OPAL_BUSY;
while(total_len > 0 && (rc == OPAL_BUSY ||
rc == OPAL_BUSY_EVENT || rc == OPAL_SUCCESS)) {
len = total_len;
diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c
index b6e5ff85cc6f13dd95e5bb8f0370cde8ec2eb5f3..07ba1ecd1807e9aab058ea119f06df6aff38f63c 100644
--- a/arch/powerpc/platforms/powernv/setup.c
+++ b/arch/powerpc/platforms/powernv/setup.c
@@ -29,17 +29,12 @@
#include <asm/machdep.h>
#include <asm/firmware.h>
#include <asm/xics.h>
+#include <asm/opal.h>
#include "powernv.h"
static void __init pnv_setup_arch(void)
{
- /* Force console to hvc for now until we have sorted out the
- * real console situation for the platform. This will make
- * hvc_udbg work at least.
- */
- add_preferred_console("hvc", 0, NULL);
-
/* Initialize SMP */
pnv_smp_init();
@@ -55,7 +50,12 @@ static void __init pnv_setup_arch(void)
static void __init pnv_init_early(void)
{
- /* XXX IOMMU */
+#ifdef CONFIG_HVC_OPAL
+ if (firmware_has_feature(FW_FEATURE_OPAL))
+ hvc_opal_init_early();
+ else
+#endif
+ add_preferred_console("hvc", 0, NULL);
}
static void __init pnv_init_IRQ(void)
diff --git a/drivers/tty/hvc/Kconfig b/drivers/tty/hvc/Kconfig
index e371753ba921d24f33622172a497b1d115b315c6..4222035acfb71987a7f3f7c50db32cd5aae87262 100644
--- a/drivers/tty/hvc/Kconfig
+++ b/drivers/tty/hvc/Kconfig
@@ -34,6 +34,15 @@ config HVC_ISERIES
help
iSeries machines support a hypervisor virtual console.
+config HVC_OPAL
+ bool "OPAL Console support"
+ depends on PPC_POWERNV
+ select HVC_DRIVER
+ select HVC_IRQ
+ default y
+ help
+ PowerNV machines running under OPAL need that driver to get a console
+
config HVC_RTAS
bool "IBM RTAS Console support"
depends on PPC_RTAS
diff --git a/drivers/tty/hvc/Makefile b/drivers/tty/hvc/Makefile
index e29205316376394db8dfc7f2f340c65433daddee..89abf40bc73d3bd30c8d363e5224e3b2ef7a9927 100644
--- a/drivers/tty/hvc/Makefile
+++ b/drivers/tty/hvc/Makefile
@@ -1,4 +1,5 @@
obj-$(CONFIG_HVC_CONSOLE) += hvc_vio.o hvsi_lib.o
+obj-$(CONFIG_HVC_OPAL) += hvc_opal.o hvsi_lib.o
obj-$(CONFIG_HVC_OLD_HVSI) += hvsi.o
obj-$(CONFIG_HVC_ISERIES) += hvc_iseries.o
obj-$(CONFIG_HVC_RTAS) += hvc_rtas.o
diff --git a/drivers/tty/hvc/hvc_opal.c b/drivers/tty/hvc/hvc_opal.c
new file mode 100644
index 0000000000000000000000000000000000000000..7b38512d6c419cd43690bca290ab4765220c409b
--- /dev/null
+++ b/drivers/tty/hvc/hvc_opal.c
@@ -0,0 +1,424 @@
+/*
+ * opal driver interface to hvc_console.c
+ *
+ * Copyright 2011 Benjamin Herrenschmidt <benh@kernel.crashing.org>, IBM Corp.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#undef DEBUG
+
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/console.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+
+#include <asm/hvconsole.h>
+#include <asm/prom.h>
+#include <asm/firmware.h>
+#include <asm/hvsi.h>
+#include <asm/udbg.h>
+#include <asm/opal.h>
+
+#include "hvc_console.h"
+
+static const char hvc_opal_name[] = "hvc_opal";
+
+static struct of_device_id hvc_opal_match[] __devinitdata = {
+ { .name = "serial", .compatible = "ibm,opal-console-raw" },
+ { .name = "serial", .compatible = "ibm,opal-console-hvsi" },
+ { },
+};
+
+typedef enum hv_protocol {
+ HV_PROTOCOL_RAW,
+ HV_PROTOCOL_HVSI
+} hv_protocol_t;
+
+struct hvc_opal_priv {
+ hv_protocol_t proto; /* Raw data or HVSI packets */
+ struct hvsi_priv hvsi; /* HVSI specific data */
+};
+static struct hvc_opal_priv *hvc_opal_privs[MAX_NR_HVC_CONSOLES];
+
+/* For early boot console */
+static struct hvc_opal_priv hvc_opal_boot_priv;
+static u32 hvc_opal_boot_termno;
+
+static const struct hv_ops hvc_opal_raw_ops = {
+ .get_chars = opal_get_chars,
+ .put_chars = opal_put_chars,
+ .notifier_add = notifier_add_irq,
+ .notifier_del = notifier_del_irq,
+ .notifier_hangup = notifier_hangup_irq,
+};
+
+static int hvc_opal_hvsi_get_chars(uint32_t vtermno, char *buf, int count)
+{
+ struct hvc_opal_priv *pv = hvc_opal_privs[vtermno];
+
+ if (WARN_ON(!pv))
+ return -ENODEV;
+
+ return hvsilib_get_chars(&pv->hvsi, buf, count);
+}
+
+static int hvc_opal_hvsi_put_chars(uint32_t vtermno, const char *buf, int count)
+{
+ struct hvc_opal_priv *pv = hvc_opal_privs[vtermno];
+
+ if (WARN_ON(!pv))
+ return -ENODEV;
+
+ return hvsilib_put_chars(&pv->hvsi, buf, count);
+}
+
+static int hvc_opal_hvsi_open(struct hvc_struct *hp, int data)
+{
+ struct hvc_opal_priv *pv = hvc_opal_privs[hp->vtermno];
+ int rc;
+
+ pr_devel("HVSI@%x: do open !\n", hp->vtermno);
+
+ rc = notifier_add_irq(hp, data);
+ if (rc)
+ return rc;
+
+ return hvsilib_open(&pv->hvsi, hp);
+}
+
+static void hvc_opal_hvsi_close(struct hvc_struct *hp, int data)
+{
+ struct hvc_opal_priv *pv = hvc_opal_privs[hp->vtermno];
+
+ pr_devel("HVSI@%x: do close !\n", hp->vtermno);
+
+ hvsilib_close(&pv->hvsi, hp);
+
+ notifier_del_irq(hp, data);
+}
+
+void hvc_opal_hvsi_hangup(struct hvc_struct *hp, int data)
+{
+ struct hvc_opal_priv *pv = hvc_opal_privs[hp->vtermno];
+
+ pr_devel("HVSI@%x: do hangup !\n", hp->vtermno);
+
+ hvsilib_close(&pv->hvsi, hp);
+
+ notifier_hangup_irq(hp, data);
+}
+
+static int hvc_opal_hvsi_tiocmget(struct hvc_struct *hp)
+{
+ struct hvc_opal_priv *pv = hvc_opal_privs[hp->vtermno];
+
+ if (!pv)
+ return -EINVAL;
+ return pv->hvsi.mctrl;
+}
+
+static int hvc_opal_hvsi_tiocmset(struct hvc_struct *hp, unsigned int set,
+ unsigned int clear)
+{
+ struct hvc_opal_priv *pv = hvc_opal_privs[hp->vtermno];
+
+ pr_devel("HVSI@%x: Set modem control, set=%x,clr=%x\n",
+ hp->vtermno, set, clear);
+
+ if (set & TIOCM_DTR)
+ hvsilib_write_mctrl(&pv->hvsi, 1);
+ else if (clear & TIOCM_DTR)
+ hvsilib_write_mctrl(&pv->hvsi, 0);
+
+ return 0;
+}
+
+static const struct hv_ops hvc_opal_hvsi_ops = {
+ .get_chars = hvc_opal_hvsi_get_chars,
+ .put_chars = hvc_opal_hvsi_put_chars,
+ .notifier_add = hvc_opal_hvsi_open,
+ .notifier_del = hvc_opal_hvsi_close,
+ .notifier_hangup = hvc_opal_hvsi_hangup,
+ .tiocmget = hvc_opal_hvsi_tiocmget,
+ .tiocmset = hvc_opal_hvsi_tiocmset,
+};
+
+static int __devinit hvc_opal_probe(struct platform_device *dev)
+{
+ const struct hv_ops *ops;
+ struct hvc_struct *hp;
+ struct hvc_opal_priv *pv;
+ hv_protocol_t proto;
+ unsigned int termno, boot = 0;
+ const __be32 *reg;
+
+ if (of_device_is_compatible(dev->dev.of_node, "ibm,opal-console-raw")) {
+ proto = HV_PROTOCOL_RAW;
+ ops = &hvc_opal_raw_ops;
+ } else if (of_device_is_compatible(dev->dev.of_node,
+ "ibm,opal-console-hvsi")) {
+ proto = HV_PROTOCOL_HVSI;
+ ops = &hvc_opal_hvsi_ops;
+ } else {
+ pr_err("hvc_opal: Unkown protocol for %s\n",
+ dev->dev.of_node->full_name);
+ return -ENXIO;
+ }
+
+ reg = of_get_property(dev->dev.of_node, "reg", NULL);
+ termno = reg ? be32_to_cpup(reg) : 0;
+
+ /* Is it our boot one ? */
+ if (hvc_opal_privs[termno] == &hvc_opal_boot_priv) {
+ pv = hvc_opal_privs[termno];
+ boot = 1;
+ } else if (hvc_opal_privs[termno] == NULL) {
+ pv = kzalloc(sizeof(struct hvc_opal_priv), GFP_KERNEL);
+ if (!pv)
+ return -ENOMEM;
+ pv->proto = proto;
+ hvc_opal_privs[termno] = pv;
+ if (proto == HV_PROTOCOL_HVSI)
+ hvsilib_init(&pv->hvsi, opal_get_chars, opal_put_chars,
+ termno, 0);
+
+ /* Instanciate now to establish a mapping index==vtermno */
+ hvc_instantiate(termno, termno, ops);
+ } else {
+ pr_err("hvc_opal: Device %s has duplicate terminal number #%d\n",
+ dev->dev.of_node->full_name, termno);
+ return -ENXIO;
+ }
+
+ pr_info("hvc%d: %s protocol on %s%s\n", termno,
+ proto == HV_PROTOCOL_RAW ? "raw" : "hvsi",
+ dev->dev.of_node->full_name,
+ boot ? " (boot console)" : "");
+
+ /* We don't do IRQ yet */
+ hp = hvc_alloc(termno, 0, ops, MAX_VIO_PUT_CHARS);
+ if (IS_ERR(hp))
+ return PTR_ERR(hp);
+ dev_set_drvdata(&dev->dev, hp);
+
+ return 0;
+}
+
+static int __devexit hvc_opal_remove(struct platform_device *dev)
+{
+ struct hvc_struct *hp = dev_get_drvdata(&dev->dev);
+ int rc, termno;
+
+ termno = hp->vtermno;
+ rc = hvc_remove(hp);
+ if (rc == 0) {
+ if (hvc_opal_privs[termno] != &hvc_opal_boot_priv)
+ kfree(hvc_opal_privs[termno]);
+ hvc_opal_privs[termno] = NULL;
+ }
+ return rc;
+}
+
+static struct platform_driver hvc_opal_driver = {
+ .probe = hvc_opal_probe,
+ .remove = __devexit_p(hvc_opal_remove),
+ .driver = {
+ .name = hvc_opal_name,
+ .owner = THIS_MODULE,
+ .of_match_table = hvc_opal_match,
+ }
+};
+
+static int __init hvc_opal_init(void)
+{
+ if (!firmware_has_feature(FW_FEATURE_OPAL))
+ return -ENODEV;
+
+ /* Register as a vio device to receive callbacks */
+ return platform_driver_register(&hvc_opal_driver);
+}
+module_init(hvc_opal_init);
+
+static void __exit hvc_opal_exit(void)
+{
+ platform_driver_unregister(&hvc_opal_driver);
+}
+module_exit(hvc_opal_exit);
+
+static void udbg_opal_putc(char c)
+{
+ unsigned int termno = hvc_opal_boot_termno;
+ int count = -1;
+
+ if (c == '\n')
+ udbg_opal_putc('\r');
+
+ do {
+ switch(hvc_opal_boot_priv.proto) {
+ case HV_PROTOCOL_RAW:
+ count = opal_put_chars(termno, &c, 1);
+ break;
+ case HV_PROTOCOL_HVSI:
+ count = hvc_opal_hvsi_put_chars(termno, &c, 1);
+ break;
+ }
+ } while(count == 0 || count == -EAGAIN);
+}
+
+static int udbg_opal_getc_poll(void)
+{
+ unsigned int termno = hvc_opal_boot_termno;
+ int rc = 0;
+ char c;
+
+ switch(hvc_opal_boot_priv.proto) {
+ case HV_PROTOCOL_RAW:
+ rc = opal_get_chars(termno, &c, 1);
+ break;
+ case HV_PROTOCOL_HVSI:
+ rc = hvc_opal_hvsi_get_chars(termno, &c, 1);
+ break;
+ }
+ if (!rc)
+ return -1;
+ return c;
+}
+
+static int udbg_opal_getc(void)
+{
+ int ch;
+ for (;;) {
+ ch = udbg_opal_getc_poll();
+ if (ch == -1) {
+ /* This shouldn't be needed...but... */
+ volatile unsigned long delay;
+ for (delay=0; delay < 2000000; delay++)
+ ;
+ } else {
+ return ch;
+ }
+ }
+}
+
+static void udbg_init_opal_common(void)
+{
+ udbg_putc = udbg_opal_putc;
+ udbg_getc = udbg_opal_getc;
+ udbg_getc_poll = udbg_opal_getc_poll;
+ tb_ticks_per_usec = 0x200; /* Make udelay not suck */
+}
+
+void __init hvc_opal_init_early(void)
+{
+ struct device_node *stdout_node = NULL;
+ const u32 *termno;
+ const char *name = NULL;
+ const struct hv_ops *ops;
+ u32 index;
+
+ /* find the boot console from /chosen/stdout */
+ if (of_chosen)
+ name = of_get_property(of_chosen, "linux,stdout-path", NULL);
+ if (name) {
+ stdout_node = of_find_node_by_path(name);
+ if (!stdout_node) {
+ pr_err("hvc_opal: Failed to locate default console!\n");
+ return;
+ }
+ } else {
+ struct device_node *opal, *np;
+
+ /* Current OPAL takeover doesn't provide the stdout
+ * path, so we hard wire it
+ */
+ opal = of_find_node_by_path("/ibm,opal/consoles");
+ if (opal)
+ pr_devel("hvc_opal: Found consoles in new location\n");
+ if (!opal) {
+ opal = of_find_node_by_path("/ibm,opal");
+ if (opal)
+ pr_devel("hvc_opal: "
+ "Found consoles in old location\n");
+ }
+ if (!opal)
+ return;
+ for_each_child_of_node(opal, np) {
+ if (!strcmp(np->name, "serial")) {
+ stdout_node = np;
+ break;
+ }
+ }
+ of_node_put(opal);
+ }
+ if (!stdout_node)
+ return;
+ termno = of_get_property(stdout_node, "reg", NULL);
+ index = termno ? *termno : 0;
+ if (index >= MAX_NR_HVC_CONSOLES)
+ return;
+ hvc_opal_privs[index] = &hvc_opal_boot_priv;
+
+ /* Check the protocol */
+ if (of_device_is_compatible(stdout_node, "ibm,opal-console-raw")) {
+ hvc_opal_boot_priv.proto = HV_PROTOCOL_RAW;
+ ops = &hvc_opal_raw_ops;
+ pr_devel("hvc_opal: Found RAW console\n");
+ }
+ else if (of_device_is_compatible(stdout_node,"ibm,opal-console-hvsi")) {
+ hvc_opal_boot_priv.proto = HV_PROTOCOL_HVSI;
+ ops = &hvc_opal_hvsi_ops;
+ hvsilib_init(&hvc_opal_boot_priv.hvsi, opal_get_chars,
+ opal_put_chars, index, 1);
+ /* HVSI, perform the handshake now */
+ hvsilib_establish(&hvc_opal_boot_priv.hvsi);
+ pr_devel("hvc_opal: Found HVSI console\n");
+ } else
+ goto out;
+ hvc_opal_boot_termno = index;
+ udbg_init_opal_common();
+ add_preferred_console("hvc", index, NULL);
+ hvc_instantiate(index, index, ops);
+out:
+ of_node_put(stdout_node);
+}
+
+#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL_RAW
+void __init udbg_init_debug_opal(void)
+{
+ u32 index = CONFIG_PPC_EARLY_DEBUG_OPAL_VTERMNO;
+ hvc_opal_privs[index] = &hvc_opal_boot_priv;
+ hvc_opal_boot_priv.proto = HV_PROTOCOL_RAW;
+ hvc_opal_boot_termno = index;
+ udbg_init_opal_common();
+}
+#endif /* CONFIG_PPC_EARLY_DEBUG_OPAL_RAW */
+
+#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL_HVSI
+void __init udbg_init_debug_opal_hvsi(void)
+{
+ u32 index = CONFIG_PPC_EARLY_DEBUG_OPAL_VTERMNO;
+ hvc_opal_privs[index] = &hvc_opal_boot_priv;
+ hvc_opal_boot_termno = index;
+ udbg_init_opal_common();
+ hvsilib_init(&hvc_opal_boot_priv.hvsi, opal_get_chars, opal_put_chars,
+ index, 1);
+ hvsilib_establish(&hvc_opal_boot_priv.hvsi);
+}
+#endif /* CONFIG_PPC_EARLY_DEBUG_OPAL_HVSI */
diff --git a/drivers/tty/hvc/hvsi_lib.c b/drivers/tty/hvc/hvsi_lib.c
index bd9b09827b24991db437deb492e1b6f82a43ae26..6f4dd83d869533a3ff61b3e1b0d0c3d80a0f6c99 100644
--- a/drivers/tty/hvc/hvsi_lib.c
+++ b/drivers/tty/hvc/hvsi_lib.c
@@ -183,7 +183,7 @@ int hvsilib_get_chars(struct hvsi_priv *pv, char *buf, int count)
unsigned int tries, read = 0;
if (WARN_ON(!pv))
- return 0;
+ return -ENXIO;
/* If we aren't open, don't do anything in order to avoid races
* with connection establishment. The hvc core will call this
@@ -234,7 +234,7 @@ int hvsilib_put_chars(struct hvsi_priv *pv, const char *buf, int count)
int rc, adjcount = min(count, HVSI_MAX_OUTGOING_DATA);
if (WARN_ON(!pv))
- return 0;
+ return -ENODEV;
dp.hdr.type = VS_DATA_PACKET_HEADER;
dp.hdr.len = adjcount + sizeof(struct hvsi_header);