[Skiboot] [PATCH v3 07/11] astbmc: Remove coordinated isolation support

[Andrew Jeffery]

Signed-off-by: Andrew Jeffery <andrew at aj.id.au>
---
 hw/ast-bmc/ast-io.c       | 56 ---------------------------------------
 include/ast.h             |  2 --
 platforms/astbmc/common.c | 47 +++++---------------------------
 3 files changed, 6 insertions(+), 99 deletions(-)

diff --git a/hw/ast-bmc/ast-io.c b/hw/ast-bmc/ast-io.c
index e8258b4cfc02..7f8c2dafa5ef 100644
--- a/hw/ast-bmc/ast-io.c
+++ b/hw/ast-bmc/ast-io.c
@@ -360,62 +360,6 @@ bool ast_sio_init(void)
 	return enabled;
 }
 
-bool ast_sio_disable(void)
-{
-	uint32_t hw_strapping;
-	uint32_t silicon_rev;
-	uint8_t family;
-
-	/* Determine the necessary strapping value */
-	silicon_rev = ast_ahb_readl(SCU_REVISION_ID);
-	family = SCU_REVISION_SOC_FAMILY(silicon_rev);
-
-	if (family == SCU_REVISION_SOC_FAMILY_2400) {
-		/* Strapping is read-modify-write on SCU70 */
-		hw_strapping = SCU_STRAP_SIO_DECODE_DISABLE;
-		hw_strapping |= ast_ahb_readl(SCU_HW_STRAPPING);
-	} else if (family == SCU_REVISION_SOC_FAMILY_2500) {
-		/*
-		 * Strapping is W1S on SCU70, W1C on SCU7C. We're setting a bit
-		 * so read-modify-write *should* work, but in reality it breaks
-		 * the AXI/AHB divider, so don't do that.
-		 */
-		hw_strapping = SCU_STRAP_SIO_DECODE_DISABLE;
-	} else {
-		prerror("PLAT: Unrecognised BMC silicon revision 0x%x\n",
-			silicon_rev);
-		return false;
-	}
-
-	/* Apply the strapping value */
-	bmc_sio_get(BMC_SIO_DEV_LPC2AHB);
-
-	bmc_sio_ahb_prep(SCU_HW_STRAPPING, 2);
-
-	bmc_sio_outb(hw_strapping >> 24, 0xf4);
-	bmc_sio_outb(hw_strapping >> 16, 0xf5);
-	bmc_sio_outb(hw_strapping >>  8, 0xf6);
-	bmc_sio_outb(hw_strapping      , 0xf7);
-
-	lpc_irq_err_mask_sync_no_response();
-	bmc_sio_outb(0xcf, 0xfe);
-
-	bmc_sio_put(true);
-
-	return true;
-}
-
-bool ast_can_isolate_sp(void)
-{
-	bool isolate;
-
-	bmc_sio_get(BMC_SIO_DEV_LPC2AHB);
-	isolate = bmc_sio_inb(BMC_SIO_PLAT_FLAGS) & BMC_SIO_PLAT_ISOLATE_SP;
-	bmc_sio_put(true);
-
-	return isolate;
-}
-
 bool ast_io_is_rw(void)
 {
 	return !(ast_ahb_readl(LPC_HICRB) & LPC_HICRB_ILPC_DISABLE);
diff --git a/include/ast.h b/include/ast.h
index 4c8fd817b253..c3e171804dee 100644
--- a/include/ast.h
+++ b/include/ast.h
@@ -82,8 +82,6 @@ void ast_ahb_writel(uint32_t val, uint32_t reg);
 uint32_t ast_ahb_readl(uint32_t reg);
 
 bool ast_sio_init(void);
-bool ast_can_isolate_sp(void);
-bool ast_sio_disable(void);
 bool ast_io_init(void);
 bool ast_io_is_rw(void);
 bool ast_lpc_fw_maps_flash(void);
diff --git a/platforms/astbmc/common.c b/platforms/astbmc/common.c
index f3b7e749f87c..0cf70e260d94 100644
--- a/platforms/astbmc/common.c
+++ b/platforms/astbmc/common.c
@@ -406,23 +406,15 @@ void astbmc_early_init(void)
 	psi_set_external_irq_policy(EXTERNAL_IRQ_POLICY_SKIBOOT);
 
 	if (ast_sio_init()) {
-		if (!ast_can_isolate_sp()) {
-			/*
-			 * BMCs claiming support for isolation must have
-			 * correctly configured the UART and BT for host
-			 * firmware. If not, let's apply some fixups for broken
-			 * BMC firmwares.
-			 */
-			if (ast_io_init()) {
-				astbmc_fixup_uart();
-				ast_setup_ibt(BT_IO_BASE, BT_LPC_IRQ);
-			} else
-				prerror("PLAT: AST IO initialisation failed!\n");
-		}
+		if (ast_io_init()) {
+			astbmc_fixup_uart();
+			ast_setup_ibt(BT_IO_BASE, BT_LPC_IRQ);
+		} else
+			prerror("PLAT: AST IO initialisation failed!\n");
 
 		ast_setup_sio_mbox(MBOX_IO_BASE, MBOX_LPC_IRQ);
 	} else
-		prerror("PLAT: AST SIO initialisation failed!\n");
+		prlog(PR_WARNING, "PLAT: AST SIO unavailable!\n");
 
 	/* Setup UART and use it as console */
 	uart_init();
@@ -430,35 +422,8 @@ void astbmc_early_init(void)
 	prd_init();
 }
 
-static bool astbmc_isolate_via_io(void)
-{
-	return ast_sio_disable();
-}
-
-static bool astbmc_isolate_via_ipmi(void)
-{
-	return false;
-}
-
-static void astbmc_isolate(void)
-{
-	bool isolated;
-
-	isolated = ast_io_is_rw() ? astbmc_isolate_via_io()
-				  : astbmc_isolate_via_ipmi();
-
-	if (!isolated) {
-		prlog(PR_EMERG, "PLAT: BMC isolation failed\n");
-		abort();
-	}
-
-	prlog(PR_INFO, "PLAT: Isolated BMC\n");
-}
-
 void astbmc_exit(void)
 {
-	if (ast_can_isolate_sp())
-		astbmc_isolate();
 	ipmi_wdt_final_reset();
 }
 
-- 
2.17.1